PERZANOWSKI, Jerzy; PIETRUSZCZAK, Andrzej. Preface. Logic and Logical Philosophy, [S. l.], v. 7, n. 7, p. 5–6, 2005. DOI: 10.12775/7493. Disponível em: https://apcz.umk.pl/LLP/article/view/7493. Acesso em: 3 feb. 2025.