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://journals.us.edu.pl/index.php/AMSIL/article/view/14311. Acesso em: 5 dec. 2025.