PAN, Wenjun; WANG, Qiumei; ZHAN, Jianming. FUZZY PARAMETERIZED FUZZY SOFT NORMAL SUBGROUPS OF GROUPS. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 36, p. 271–282, 2016. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6628. Acesso em: 5 sep. 2026.