On the action of a fuzzy group on a fuzzy set. Fountain Journal of Natural and Applied Sciences, [S. l.], v. 12, n. 1, 2023. DOI: 10.53704/fujnas.v12i1.445. Disponível em: https://new.fountainjournals.com/index.php/FUJNAS/article/view/445. Acesso em: 20 apr. 2026.