KHAN, N. M. On Epimorphically Closed Homotypical Permutative Varieties. Kathmandu University Journal of Science, Engineering and Technology, [S. l.], v. 3, n. 1, 2007. DOI: 10.3126/kuset.v3i1.64164. Disponível em: https://nepjol.info./index.php/KUSET/article/view/64164. Acesso em: 24 nov. 2024.