KRÓL, Jerzy. How do we know that physical spacetime in cosmology is smooth and 4-dimensional?. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 63, p. 101–111, 2017. DOI: 10.59203/zfn.63.412. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/412. Acesso em: 25 nov. 2025.