CZERNECKA-REJ, B. The Problem of Future Contingents (in Polish). Diametros, [S. l.], n. 52, p. 138–143, 2017. DOI: 10.13153/diam.52.2017.1066. Disponível em: https://diametros.uj.edu.pl/diametros/article/view/1066. Acesso em: 14 may. 2021.