MASSA’DEH, Mourad Oqla; FELLATAH, Ahlam. On hyper Q-fuzzy normal HX subgroup, conjugate and its normal level. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 42, p. 624–634, 2019. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/7203. Acesso em: 27 oct. 2026.