TKACZYK, Marcin; JARMUŻEK, Tomasz. Jerzy Łoś Positional Calculus and the Origin of Temporal Logic. Logic and Logical Philosophy, [S. l.], v. 28, n. 2, p. 259–276, 2018. DOI: 10.12775/LLP.2018.013. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.2018.013. Acesso em: 2 jul. 2025.