YU, Dapeng; BORDBAR, Hashem; ZAHEDI, Mohammad Mehdi; JUN, Young Bae. WEAK CLOSURE OPERATIONS WITH SPECIAL TYPES IN LOWER BCK-SEMILATTICES. Italian Journal of Pure and Applied Mathematics, [S. l.], v. 37, p. 633–644, 2017. Disponível em: https://journals.uniurb.it/index.php/ijpam/article/view/6670. Acesso em: 5 sep. 2026.