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://trrest.vot.pl/ojsus/index.php/ssht/article/view/16296. Acesso em: 1 lip. 2025.