On Z-open sets. Journal of the College of Basic Education, [S. l.], v. 21, n. 88, p. 101–108, 2023. DOI: 10.35950/cbej.v21i88.9955. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9955.. Acesso em: 20 apr. 2025.