D. MALARVIZHI; C. RAJAN. PROPERTIES OF SOME NEW CLOSED SETS IN TOPOLOGICAL SPACES. Utilitas Mathematica , [S. l.], v. 122, n. 1, p. 1280–1285, 2025. Disponível em: https://utilitasmathematica.com/index.php/Index/article/view/2343. Acesso em: 26 jul. 2026.