KOWALCZYK, S. Classical Philosophy of Truth and Karl Popper’s Conception of Objective Knowledge. Roczniki Nauk Społecznych, [S. l.], v. 51, n. 1, p. 9–22, 2023. DOI: 10.18290/rns2023.0014. Disponível em: https://czasopisma.tnkul.pl/index.php/rns/article/view/243. Acesso em: 31 oct. 2025.