KADHAM AL-TALKANY, Yiezi; A.J. AL-SWIDI, Ameer; YOUNIS SHAKER, Ali. Topological study via σ-algebra. Journal of Al-Qadisiyah for Computer Science and Mathematics, [S. l.], v. 8, n. 1, p. 78–82, 2017. Disponível em: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/46. Acesso em: 15 nov. 2024.