IBRAHIM, H. Z. On Pre-γ-I-Open Sets In Ideal Topological Spaces. Science Journal of University of Zakho, [S. l.], v. 1, n. 1, p. 349–353, 2018. Disponível em: https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/119. Acesso em: 22 nov. 2024.