JANUSZ, R. The centenary of Einstein’s and de Sitter’s cosmological works. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 63, p. 167–181, 2017. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/415. Acesso em: 8 feb. 2023.