J. B. TORANAGATTI; T. NOIRI. On Regular δ-Preopen Sets. Jordan Journal of Mathematics and Statistics, [S. l.], v. 15, n. 3B, p. 615–627, 2025. Disponível em: https://jjms.yu.edu.jo/index.php/jjms/article/view/736. Acesso em: 18 aug. 2025.