SAIF, Amin; QASSEM, Ali. On Generalized N−preopen Sets. Thamar University Journal of Natural & Applied Sciences, [S. l.], v. 7, n. 1, p. 113–127, 2023. DOI: 10.59167/tujnas.v7i7.1348. Disponível em: http://journal.tu.edu.ye/index.php/TUJNAS/article/view/1348. Acesso em: 29 apr. 2024.