PIECHOWICZ, R. 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. Disponível em: https://zfn.edu.pl/index.php/zfn/article/view/499. Acesso em: 9 dec. 2022.