i-Open Sets in Bitopological Spaces. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 12, n. 1, p. 13–23, 2018. DOI: 10.33899/csmj.2018.163567 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36790. Acesso em: 25 jun. 2026.