LONČAR, Ivan. COMPACTNESS OF S(n)-CLOSED SPACES. Matematichki Bilten, [S. l.], v. 41, n. 2, p. 30–38, 2017. DOI: 10.37560/matbil17200030l. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1849. Acesso em: 14 aug. 2026.