FENG, Yuming. p-fuzzy hypergroupoids associated to the product of p-fuzzy hypergraphs. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 28, p. 151–160, 2011. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/5999. Acesso em: 18 jul. 2026.