Infra -β - Closed (Open) Sets : New Characterization and Applications. Punjab University Journal of Mathematics, [S. l.], v. 53, n. 12, p. 843–853, 2025. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/304. Acesso em: 29 jun. 2025.