WYDERKA, Zdzisław. On the structure of two-person, finite, zero-sum games. Annales Mathematicae Silesianae, [S. l.], v. 3, p. 127–131, 1990. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14311. Acesso em: 7 may. 2025.