HAMMED, Dunya M; SALMAN, Mayssa Z. Some Types of Contra- gp- Closed Functions in Topological Spaces. Al-Nahrain Journal of Science, [S. l.], v. 17, n. 2, p. 189–198, 2018. Disponível em: https://mail.anjs.edu.iq/index.php/anjs/article/view/460. Acesso em: 22 may. 2026.