Unsolved Problem in Classical Mechanics . Bulletin of Pure and Applied Sciences – Physics, [S. l.], v. 39, n. 1, p. 13–26, 2020. DOI: 10.48165/. Disponível em: https://journals.acspublisher.com/index.php/bpasphy/article/view/9062. Acesso em: 8 apr. 2025.