NADA K. ABDULLAH; SUMMER W. OMAR. Sets That Exist in A Topological Space and Have the Qualities of Being Ideal and Pre-Semi Open. Eurasian Journal of Physics,Chemistry and Mathematics, [S. l.], v. 21, p. 50–56, 2023. Disponível em: https://geniusjournals.org/index.php/ejpcm/article/view/4854. Acesso em: 10 jan. 2025.