OBOJSKA, Lidia. Elements of Logic in the Polish School of Mathematics. The contribution of Stanisław Leśniewski. Philosophical Problems in Science (Zagadnienia Filozoficzne w Nauce), [S. l.], n. 53, p. 165–197, 2013. DOI: 10.59203/zfn.53.61. Disponível em: https://www.zfn.edu.pl/index.php/zfn/article/view/61. Acesso em: 26 nov. 2025.