PIECHOWICZ, Robert. Logika niedogmatyczna. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 36, p. 148–151, 2005. DOI: 10.59203/zfn.36.353. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/353. Acesso em: 28 jan. 2026.