OTISK, Marek. From the proof of God’s existence to the abacus. Śląskie Studia Historyczno-Teologiczne, [S. l.], v. 47, n. 1, p. 52–61, 2014. Disponível em: https://journals.us.edu.pl/index.php/ssht/article/view/16296. Acesso em: 17 kwi. 2025.