SHALINI, A.Francina. ÄŒech Ï€gβ - CLOSED SETS IN CLOSURE SPACES. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 1, n. 4, p. 50–56, 2013. Disponível em: https://jgrma.com/index.php/jgrma/article/view/54. Acesso em: 14 mar. 2025.