- Video conference (February 04, 2017) about Relational Mechanics (1 hour presentation plus 1 hour debate): https://youtu.be/L6A59tWV6EM, https://www.youtube.com/watch?v=L6A59tWV6EM&feature=youtu.be and also the fuze meeting: https://www.fuzemeeting.com/replay_meeting/5f20f4f5/8195442. In this talk we present Galileo's free fall experiment and its interpretation in Newtonian mechanics. We also present Newton's bucket experiment. In this case we have a bucket partially filled with water hanging by a rope. When the bucket and the water are at rest relative to the ground, the surface of the water is flat. When the bucket and the water rotate together relative to the ground, the surface of the water becomes concave (the water rises towards the sides of the bucket, acquiring a parabolic shape). In Newtonian mechanics the curvature of the water surface is
__not__due to its rotation relative to the bucket, relative to the Earth, nor relative to the distant stars and galaxies. To Newton this experiment proved the existence of empty and free space, which he called absolute space. According to Newton, the curvature of the water was due to its rotation relative to absolute space. We then discuss the criticisms of Ernst Mach against Newtonian mechanics. An emphasis is given in Mach's ideas according to which the inertia of any body is due to its gravitational interaction with the distant masses in the universe. Einstein's theories of relativity do not implement Mach's principle. This fact is one of the reasons why we are totally against Einstein’s special and general theories of relativity. Finally we present Relational Mechanics, a theory which implements quantitatively Mach's ideas about the origin of inertia utilizing Weber's law for gravitation. We discuss Galileo's free fall experiment and Newton's bucket experiment from the point of view of Relational Mechanics. We also present experimental tests in order to distinguish Relational Mechanics from Einstein’s general theory of relativity. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Relational-Mechanics-04-02-2017.pdf. Video seminar (March, 2017) discussing Relational Mechanics, Weber's Electrodynamics and Weber's planetary model of the atom (1 hour debate) at the graduate course "History of Physics: Shaping Electromagnetism". Lecturers of this course: Ricardo Karam and Helge Kragh, University of Copenhagen, Denmark. Video seminar: https://youtu.be/E24rJr_PSJI. - Video conference (November 06, 2010) about Weber’s Electrodynamics (1 hour presentation plus 1 hour debate): https://youtu.be/raG5kr5ba4c and https://www.youtube.com/watch?v=raG5kr5ba4c&t=1279s. In this talk we present the origins of Weber’s electrodynamics (1846). Ampère’s force between current elements is discussed and compared with Grassmann-Biot-Savart’s law. Lorentz’s force is compared with Weber’s force. We discuss a different prediction given by these two formulations, namely, the force upon an accelerated test charge generated by a uniformly charged spherical shell at rest around the test charge. According to Weber’s electrodynamics the test charge should behave as having an effective inertial mass depending upon the charge of the surrounding spherical shell. Nothing of this should happen according to Lorentz’s force. Orders of magnitude for this predicted effect are presented. Modern experiments and theoretical developments related to Weber’s electrodynamics are also discussed. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Webers-Electrodynamics-06-11-2010.pdf
- Video conference (September 03, 2011) about The Electric Force of a Current (1 hour presentation plus 1 hour debate): http://db.naturalphilosophy.org/event/?eventid=461. Is there a force between a stationary resistive circuit carrying a steady current and a stationary charge outside the circuit? Does this circuit generate an electric field outside it? Is this wire with a DC current electrically neutral along its length? These are the main questions discussed in this presentation. We present the opinion of some scientists like Clausius and Feynman who believed there was no force between a charge and a circuit carrying a constant current when when they were at rest relative to one another. It is shown theoretically and experimentally that this force is different from zero and that there is a distribution of surface charges along the closed circuit carrying a steady current. We present the potential and electric field outside this circuit in different geometries: a straight wire, a coaxial cable, a twin-lead, a solenoid and a ring. The history of this subject is briefly reviewed, including a discussion of the pioneering and revolutionary works of Wilhelm Weber and Gustav Kirchhoff. Slides of this presentation: http://www.ifi.unicamp.br/~assis/The-Electric-Force-of-a-Current-03-09-2011.pdf
- Video conference (October 24, 2009) about Relational Mechanics (1 hour presentation plus 1 hour debate): http://db.naturalphilosophy.org/event/?eventid=240. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Relational-Mechanics-24-10-2009.pdf
- Conference (May 24, 2002) about Weber's Electrodynamics (1 hour presentation plus 1 hour debate) presented at Fondation Louis de Broglie, in Paris: Part I: https://youtu.be/tD73YuWich8. Part II: https://youtu.be/-4bomtmkRic. Part III: https://youtu.be/8-qpWrNSuLI. Part IV: https://youtu.be/Wsx6Kv48v40. Part V: https://youtu.be/t_ZZLsBC4Vo. We also discuss Relational Mechanics, Mach's principle, Newton's bucket experiment and Ampère's force between current elements.

- Talk presented at the Center of Helenic Studies Arete, Sao Paulo, Brazil (June 23, 2018) on "Archimedes and the Law of the Lever" or on "How Archimedes Utilized the Law of the Lever to Calculate the Volume of a Sphere" (1 hour presentation plus 1 hour debate). Part I: https://youtu.be/9go2-vrackA, part II: https://youtu.be/z5Bq287wHII. In this talk we presented some aspects of the life and work of Archimedes (287-212 b.C.). We showed his formulation of the law of the lever according to which two weights equilibrate one another at distances from the fulcrum of the lever inversely proportional to the weights. We analysed how he obtained the main mathematical results related to the circle and the sphere (length and area of the circle, volume and area of the sphere). In particular, we showed how he obtained the volume of a sphere utilizing the law of the lever. The reasoning which he followed to make this calculation has only been known since 1906 with the discovery of one of his lost works, namely, his method on mechanical theorems. It was presented in a letter addressed to Eratosthenes of Alexandria. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Arquimedes-23-06-2018.pdf.
- Talk (April 27, 2018) on the Principle of Physical Proportions (1 hour presentation and debate). Presented at the Centro Brasileiro de Pesquisas Físicas, CBPF, in Rio de Janeiro, Brazil: https://www.youtube.com/watch?v=Wen_jP9zj9o. Abstract: We presented the principle of physical proportions, a generalization of Mach's principle. According to the principle of physical proportions, all laws of physics should depend only on the ratio of known magnitudes of the same type (ratios of masses, ratios of electric charges, ratios of distances, ratios of frequencies etc.) An alternative formulation of this principle states that dimensional constants should not appear in physical laws. This principle can also be expressed by saying that all constants of physics (like the universal constant of gravitation, light velocity in vacuum, Planck's constant, Boltzmann's constant etc.) must depend on cosmological or microscopic properties of the material universe. We present laws following this principle (Archimedes's law of the lever, law of inclined plane, Kepler's law of areas etc.) and other laws which do not follow this principle (acceleration of free fall, law of ideal gases, flattening of the Earth etc.). These last examples show that the theories leading to these laws must be incomplete. We show how to implement this principle in some of these laws utilizing Relational Mechanics, which is a theory based on Weber's force applied to gravitation. We also suggest a procedure in order to implement this principle in the incomplete laws. Slides of this presentation: http://www.ifi.unicamp.br/~assis/PPF-27-04-2018.pdf. Papers on this subject: The principle of physical proportions and Das Prinzip der physikalischen Grössenverhältinisse.
- Video conference (September 18, 2017) on The Electric Force of a Current (1 hour presentation plus 1 hour debate): https://youtu.be/j0qGTMr1_FU. This talk was presented to the group Philosophysics of the Federal University of São Carlos and USP of São Carlos, Brazil. Abstract: We present an important controversy connected to a very simple problem of electricity. Consider a resistive wire at rest in the laboratory and carrying a constant electric current. This wire exerts a force on an external charge at rest relative to the wire? Related questions: This wire generates an electric field? Is the wire neutral on all points alongs its surface? We present the opinion of several scientists and textbooks claiming that this wire exerts no force on stationary charges and that it is neutral along its surface. We show that this force is different from zero and present its main components: (I) a force due to image charges induced on the surface of the wire by the external charge, and mainly (II) a force proportional to the voltage of the battery connected to the circuit. We consider several geometries (straight wire, coaxial cable, transmission line, solenoid, ring) and calculate the distribution of surface charges and the electric field outside these circuits carrying constant currents. We compare these calculations with several experiments. We show that Wilhelm Weber had predicted many of these effects for 150 years, although his pioneering work has been forgotten. Slides of this presentation: http://www.ifi.unicamp.br/~assis/A-Forca-Eletrica-de-uma-Corrente-18-09-2017.pdf.
- Talk on Weber's Electrodynamics (1 hour presentation plus 30 minutes of questions). It did take place at Federal University of Itajubá, UNIFEI, Brazil (April 06, 2017): https://youtu.be/bI0n0U5T-EE. Abstract: We present the origins of Weber's electrodynamics. We discuss Maxwell's equations, Lorentz's force and the meaning of the velocity which appears in this force. Ampère's force between current elements is compared with the force of Grassmann-Biot-Savart. We show how Weber and Kirchhoff deduced the wave equation BEFORE Maxwell. Lorentz's force is compared with Weber's force. It is presented a different prediction of these two formulations, namely, the force acting on a test charge exerted by an unformly charged spherical shell around the test particle. According to Weber's electrodynamics, the test charge, when accelerated in relation to the spherical shell, should behave as if it had an effective inertial mass which depends on the value of the charge spread on the spherical shell around it. According to Lorentz's force, on the other hand, nothing of this should happen as the spherical shell exerts no force on the internal test charge, no matter its acceleration. We present orders of magnitude for this effect. We also present Weber's planetary model of the atom which was developed BEFORE Rutherford's experiments and also before Bohr's model. In Weber's model the positive nucleous is stabilized by purely electrodynamic forces. After all, when charges of the same sign are moving at a very close distance, they should behave as if they had a negative inertial mass, attracting one another instead of repeling each other. Weber's model is a unification of the forces of nature. After all, it is not necessary to postulate nuclear forces in order to stabilize the positively electrified nucleous. We discuss modern experiments and recent theoretical developments related with Weber's electrodynamics. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Eletrodinamica-de-Weber-06-04-2017.pdf. Audio of this presentation: http://www.ifi.unicamp.br/~assis/Eletrodinamica-de-Weber-06-04-2017.WAV.
- Talk on Relational Mechanics (1 hour presentation plus 30 minutes of questions). It did take place at Federal University of Alfenas, UNIFAL, Brazil (November 03, 2016): https://www.youtube.com/watch?v=GEMkxXi7rlc. In this talk we presented Galileo's free fall experimenta and Newton's bucket experiment. In Newton’s bucket experiment we have a bucket partially filled with water hanging by a rope. When the bucket and the water are at rest relative to the ground, the surface of the water is flat. When the bucket and the water rotate together relative to the ground, the surface of the water becomes concave (the water rises towards the sides of the bucket, acquiring a parabolic shape). It is shown that in Newtonian mechanics this curvature of the water surface is not due to its rotation relative to the bucket, relative to the Earth, nor relative to the distant stars and galaxies. To Newton this experiment proved the existence of empty and free space, which he called absolute space. According to Newton, the curvature of water should be due to its rotation relative to this absolute space. The criticisms of Ernst Mach against Newtonian mechanics are discussed. An emphasis is given in Mach's ideas according to which the inertia of any body is due to its gravitational interaction with the distant universe. Einstein's theories of relativity do not implement Mach's principle. This fact is one of the reasons why we are against Einstein’s special and general theories of relativity. Finally we present Relational Mechanics, a theory which implements quantitatively Mach's ideas about the origin of inertia utilizing a Weber's law for gravitation. We discuss Galileo's free fall experiment and Newton's bucket experiment from the point of view of Relational Mechanics. Slides of this presentation: http://www.ifi.unicamp.br/~assis/Mecanica-Relacional-Unifal-3-11-2016.pdf. Discussion with the professors and students of the Federal University of Alfenas (November 04, 2016): https://m.facebook.com/story.php?story_fbid=285217098540864&id=262170374178870
- Talk on the Mechanics and Optics of Newton (1 hour presentation plus 20 minutes of questions). It did take place at the Science Center of the Federal University of Juiz de Fora - UFJF, Brazil (November 27, 2015): http://www.ufjf.br/centrodeciencias/2016/06/27/palestras-da-4a-jornada-de-divulgacao-cientifica/ and https://www.youtube.com/watch?v=49zxFqU8HVI. Slides of this presentation: http://www.ifi.unicamp.br/~assis/mecanica-optica-27-11-2015.pdf
- Talk on Relational Mechanics (1 hour presentation plus 1 hour of questions). It did take place at the Catholic University of Brasília, UCB, Brazil (September 19, 2012): https://youtu.be/JZKo426iFCo. In this talk we presented Galileo's free fall experimenta and Newton's bucket experiment. In Newton’s bucket experiment we have a bucket partially filled with water hanging by a rope. When the bucket and the water are at rest relative to the ground, the surface of the water is flat. When the bucket and the water rotate together relative to the ground, the surface of the water becomes concave (the water rises towards the sides of the bucket, acquiring a parabolic shape). It is shown that in Newtonian mechanics this curvature of the water surface is not due to its rotation relative to the bucket, relative to the Earth, nor relative to the distant stars and galaxies. To Newton this experiment proved the existence of empty and free space, which he called absolute space. According to Newton, the curvature of water should be due to its rotation relative to this absolute space. The criticisms of Ernst Mach against Newtonian mechanics are discussed. An emphasis is given in Mach's ideas according to which the inertia of any body is due to its gravitational interaction with the distant universe. Einstein's theories of relativity do not implement Mach's principle. This fact is one of the reasons why we are against Einstein’s special and general theories of relativity. Finally we present Relational Mechanics, a theory which implements quantitatively Mach's ideas about the origin of inertia utilizing a Weber's law for gravitation. We discuss Galileo's free fall experiment and Newton's bucket experiment from the point of view of Relational Mechanics.
- Talk on Relational Mechanics (1 hour presentation plus 1 hour of questions). It did take place at the Pontifícia Universidade Católica de Minas Gerais, PUC-Minas, Brazil (October 03, 2005). Part I: https://youtu.be/KxP9eNR3hQY. Part II: https://youtu.be/2q_E4URxiDA. We discuss relational mechanics, Weber's electrodynamics, Mach's principle and Newton's bucket experiment.

- Interview (October 17, 2017, 40 minutes of duration) conducted by David de Hilster of the Dissident Science channel: https://youtu.be/bW-RRH5X7sc. I discuss Relational Mechanics, Newton's bucket experiment, Weber's electrodynamics and Ampère's force between current elements.

“Universe – The Cosmology Quest”, a film by Randall Meyers (Floating World Films, 2003): http://www.universe-film.com.

This films contains interviews with several scientists who are against the big bang, discusses the history of the 3 K cosmic background radiation, Mach’s principle, plasma cosmology etc. The interviewed scientists include the Nobel Laureate Kary Mullis, the late Sir Fred Hoyle, Halton Arp, Geoffrey Burbidge, Anthony Peratt, Jayant Narlikar, Martin Lopez-Corredoira, John Dobson, Truls Hansen, Eric Lerner, Margaret Burbidge and Jean-Claude Pecker.

The film has subtitles in Portuguese, Spanish, French and Italian.

Bonus material of the film “Universe – The Cosmology Quest” about Mach's Principle and Newton’s bucket experiment - Andre Koch Torres Assis & Jayant Narlikar - Parts 1 and 2.

Universe – The Cosmology Quest (Part 1 of 2): http://www.youtube.com/watch?v=jOQFLOukrxM.

Universe – The Cosmology Quest (Part 2 of 2): http://www.youtube.com/watch?v=V4BPxQMUaAM.

TV of the State University of Maringá, Maringá, PR, Brazil: http://www.tv.uem.br. Announcement of the talk made by Prof. Daniel Gardelli: https://www.youtube.com/watch?v=J0cWL2VRQ5c. Interview with Edi Oliveira in which we talked about Relational Mechanics, February 25, 2014: https://www.youtube.com/watch?v=g1WNzhFm-wc and at the site of TV UEM. Talk delivered at the University of Maringá on February 25, 2014: https://www.youtube.com/watch?v=-8v-P6vZZbY and at the site of TV UEM.

Program Panorama Entrevista, talk show of TV Panorama, Rede Globo de Juiz de Fora, MG, Brazil, April 27, 2008 (30 minutes of duration): https://youtu.be/FUm-naE-ivU. We presented the book Relational Mechanics and discussed physics. Program conducted by Christina Musse with the participation of Profs. José Paulo Rodrigues Furtado de Mendonça, Maria Cristina Andreolli Lopes and Cláudio Henrique da Silva Teixeira.

Interview about Relational Mechanics and Weber's Electrodynamics at the TV of the city of Neuquen, Argentina (1999): https://youtu.be/jjiictYNXLY. Presentations of Jorge Guala-Valverde, J. Tramaglia and others.

Program Jo Soares Onze e Meia. Talk show where I presented my books Weber's Electrodynamics and Relational Mechanics. I also discussed Mach's principle and made a demonstration of Newton's bucket experiment. Sistema Brasileiro de Televisão - SBT, Brazil, september 07, 1998: https://youtu.be/uis0md0n3zg.

Rádio Muda, 105.7 FM, Campinas, SP, Brazil, program Fisicamente, october 05, 1998, from 23:00 h to 24:00 h.

A good discussion of Relational Mechanics in Spanish can be found in the book Inercia y Gravitacion – La Verdadera Influencia de los Astros, of J. G. Valverde (with the collaboration of J. Tramaglia and R. Rapacioli), (Fundacion Julio Palácios, Universidad Nacional Del Comahue, Argentina, 1999), ISBN: 9879770307.

D. N. Paraná, Física, Volume 3: Eletricidade (Editora Ática, São Paulo, 1994, ISBN: 85-08-04164-0), pp. 341-343.

Boletim da Agência Fapesp, 19/11/2012, Livros apoiados pela FAPESP vencem Prêmio Jabuti, text by Karina Toledo.

Boletim Eletrônico do Serviço Alemão de Intercâmbio Acadêmico - DAAD, Number 89, February 2012: Lançamentos: Eletrodinâmica de Ampère.

ComCiência - Revista Eletrônica de Jornalismo Científico, May 2003, O que mudou na física depois da radiação cósmica de fundo?, text by Susana Dias.

Saber, Centro Educacional Santa Marta - Objetivo, São Lourenço - MG, Novembro de 1999, Nº 4, p. 18, Essa Física maravilhosa!

Pesquisa FAPESP, Nº 47, outubro 1999, p. 45, Lançamentos - Uma Nova Física, André Koch Torres Assis.

Revista Isto É, número 1508, 26/08/98, pp. 58-59, journalist Angela Klinke: As leis de Assis (Assis's laws).

Revista Super Interessante, Ano 6, Nº 9, 09/92, pp. 48-53, journalists Flávio Dieguez and Marcelo Affini: Medalhas de Ouro (Golden Medals).

Jornal da Universidade Estadual de Maringá, Maringá, number 114, March 2014. Text by Edi Oliveira, Flávio Kawakami and Ana Paula Machado Velho: Professor da Unicamp vai de encontro à teoria de Einstein.

Jornal Correio Popular, Campinas, 30/11/2012, Caderno C, page C3: Editora da Unicamp está entre vencedores do Jabuti.

Boletim Unicamp Notícias, 19/10/2012: Livros com autores da Unicamp vencem Jabuti.

Jornal da Unicamp, number 519, 12 to 18 March 2012, page 10: Livro da Semana: Eletrodinâmica de Ampère.

Jornal da Ilha, Ilha Solteira, SP, Brazil, p. A-02, 10/05/2003, A Origem da Inércia, text by Haroldo de Mayo Bernardes.

Rio Negro, Neuquen, Argentina, p. 11, 29/11/2000, Isaac Newton y el retorno de los brujos, text by Jorge Guala Valverde.

La Mañana del Sur, Neuquen, Argentina, Suplemento Especial, p. 22, 02/01/2000, Tras los pasos de Einstein.

Acontecer Universitario, Universidad de Tarapacá, Arica, Chile, 20/12/1999, nº 16, p. 4, Cosmología y Gravitación.

Rio Negro - Diario de la Mañana, Patagônia, Argentina, Año 88, Nº 18346, 18/10/1999, p. 46, André Assis.

Zoom, Ano 3, Nº 4, setembro de 1999, pp. 10-11, journalist José Carlos Antônio: Mecânica Relacional - Entrevista com André Koch Torres de Assis.

Jornal Folha de São Paulo, Caderno Mais, p. 13, 12/07/1999, Livros - Uma Nova Física - André Koch Torres Assis.

São Lourenço - Jornal, p. 3, 04/07/1999, Físico da Unicamp dá palestra no Centro Educacional Santa Marta - Objetivo.

Jornal Tribuna de Minas, Caderno Dois, 15/11/1998, p. 6, journalist Mônica Ribeiro: Entrevista/ André Koch Torres de Assis.

InformANDES, Ano IX, Nº 86, outubro/1998, pp. 6-7, Marco Antônio Sperb Leite: Universidade pública e autônoma é uma oficina de cultura.

Jornal A Tarde - Caderno 4 - Cultural - p. 11 - Salvador, 26/09/1998, Olival Freire Jr.: Debate redivivo, cem anos depois.

Jornal Semana da Unicamp, Ano I, Nº 7, 22 a 28 de junho de 1998, p. 4, Lançamentos: Cálculo de Indutância e de Força em Circuitos Elétricos.

Jornal Semana da Unicamp, Ano I, Nº 6, 1 a 10 de junho de 1998, p. 4, Lançamentos: Mecânica Relacional.

Informativo da Universidade Estadual de Maringá, Ano VIII, Nº 371, 02/04/1998, p. 6, Livro trata do eletromagnetismo.

Jornal O Diário do Norte do Paraná, 25/03/1998, B-4, Literatura: Obra aborda eletromagnetismo.

Informativo da Universidade Estadual de Maringá, Ano VIII, Nº 368, 12/03/1998, p. 4, Eduem publica seis novos livros.

Jornal Folha de São Paulo, 08/11/1996, Seção de Resenhas, p. 3, Tudo era luz.

Jornal Correio Popular, Campinas, 15/08/1996, Caderno C-3, Autores da Unicamp recebem o Jabuti.

Jornal da UNICAMP, ano X, Nº 113, 08/1996, pp. 6-7, journalist Célia Piglione: Prêmio Jabuti também vem para Unicamp - De nove títulos inscritos em sete categorias, três levam quatro estatuetas.

Jornal Folha de São Paulo, caderno de empregos, 1993, journalist Dario Borelli: Tradutor de obra de Isaac Newton tem 30 anos e dois pós-doutorados.

Jornal da USP, Ano VI, nº 243, 8-14/03/1993, pp. 1 and 9, journalist Dario Borelli: Força de Newton.

Jornal Serviço Público - Ação e Modernização, Year I, Number 10, December 1992, pp. 1 and 8, journalist Italo Ramos: Mudamos a lei da gravidade.

Jornal Folha de São Paulo, 15/03/1992, Caderno de Empregos, p. 7-2, journalist Adriana Wilner: Jovem físico contesta as leis de Newton e ganha renome mundial.

Jornal Ciência Hoje, publicação da SBPC, Rio de Janeiro, 27/09/1991, Ano VI, nº 238, p. 3, Jovem físico alcança projeção.

Jornal O Estado de São Paulo, 14/09/1991, p. 14, journalist Clayton Levy: Brasileiro contesta Isaac Newton.

Jornal do Brasil, 09/06/1991, primeiro caderno, p. 26, Jovens garantem a qualidade da pesquisa científica - Um fã do A-ha que pode mudar leis de Newton.

Jornal O Estado de São Paulo, Caderno do Vestibular - COLA, Ano I, nº 28, 28/03/1991, pp. 4-6, journalist Rose Guirro: Os alunos que ficam na escola.

Jornal da UNICAMP, Ano V, nº 50, 12/1990, pp. 1 and 3, Subeditor Amarildo Carnicel: Jovem físico repensa leis de Newton.

Jornal Correio Popular, Campinas, 27/11/1990, pp. 1 and 32, journalist Maria Teresa Costa: Físico da Unicamp reforma leis de Newton.

Jornal O Globo, 24/11/1990, p. 20, journalist Iria Marly: Brasileiro põe em xeque leis de Newton.

Jornal O Estado de São Paulo, 25/11/1990, pp. 36-37, País tem nova geração de intelectuais - Físico da Unicamp emenda a segunda lei de Newton. http://www.ifi.unicamp.br/~assis/O-Estado-de-Sao-Paulo-25-11-1990.PDF. See also: http://acervo.estadao.com.br/.

Jornal Folha de São Paulo, 12/10/1990, Caderno Ciência, page G-5, journalist Marcelo Damato: Físico da Unicamp reescreve leis de Newton.

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