PIECHOWICZ, Robert. Formal reconstruction of notions of belief, utterance and trust. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 68, p. 63–77, 2020. DOI: 10.59203/zfn.68.499. Disponível em: https://www.zfn.edu.pl/index.php/zfn/article/view/499. Acesso em: 26 nov. 2025.