HELLER, Michał. Podręcznik minimum. Philosophical Problems in Science, [S. l.], n. 41, p. 166–168, 2007. DOI: 10.59203/zfn.41.276. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/276. Acesso em: 8 dec. 2025.