PAROL, Aleksander. A History of Positional Logic. Studia z Historii Filozofii, [S. l.], p. 1–60, 2025. DOI: 10.12775/szhf.2025.000. Disponível em: https://apcz.umk.pl/szhf/article/view/58477. Acesso em: 3 lip. 2025.