PABJAN, Tadeusz. The gravitational paradox. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 48, p. 111–126, 2011. DOI: 10.59203/zfn.48.142. Disponível em: https://www.zfn.edu.pl/index.php/zfn/article/view/142. Acesso em: 26 nov. 2025.