ÁDÁM, Zsolt; LAJKÓ, Károly; MAKSA, Gyula; MÉSZÁROS, Fruzsina. Two functional equations on groups. Annales Mathematicae Silesianae, [S. l.], v. 21, p. 7–13, 2007. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14055. Acesso em: 7 may. 2025.