HELLER, Michał. Cosmological questions before Einstein. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 37, p. 32–40, 2005. DOI: 10.59203/zfn.37.328. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/328. Acesso em: 28 jan. 2026.