FORTI, Gian Luigi. Alternative functional equations. A survey. Annales Mathematicae Silesianae, [S. l.], v. 40, n. 2, p. 174–218, 2026. Disponível em: https://journals.us.edu.pl/index.php/AMSIL/article/view/19906. Acesso em: 26 aug. 2026.