AKKAOUI, Ahmed; FADLI, Brahim. New results about quadratic functional equation on semigroups. Annales Mathematicae Silesianae, [S. l.], 2024. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/18119. Acesso em: 1 jul. 2025.