XU, X. . The Nature of Force and the Dark Matter: Physics. International Journal of Fundamental Physical Sciences, [S. l.], v. 9, n. 3, p. 41-47, 2019. DOI: 10.14331/ijfps.2019.330130. DisponĂ­vel em: https://fundamentaljournals.org/index.php/ijfps/article/view/24. Acesso em: 5 jun. 2023.