AL-HAMADI, K. M. A.; QASSEM, A.; SAIF, A. On regular generalized N−Preopen sets. University of Aden Journal of Natural and Applied Sciences, [S. l.], v. 24, n. 1, p. 205–215, 2020. DOI: 10.47372/uajnas.2020.n1.a18. Disponível em: https://uajnas.adenuniv.com/index.php/uajnas/article/view/71. Acesso em: 3 jan. 2025.