A New Type of ξ-Open Sets Based on Operations. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 9, n. 1, p. 181–189, 2012. DOI: 10.33899/csmj.2012.163682 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36735. Acesso em: 25 jun. 2026.