BEAULA, T.; EVANS, D. Some results on 2-fuzzy n-n Hilbert space and 2-fuzzy n-n quasi inner product space. Asian Journal of Fuzzy and Applied Mathematics, [S. l.], v. 4, n. 5, 2016. Disponível em: https://ajouronline.com/index.php/AJFAM/article/view/4171. Acesso em: 20 apr. 2024.