PAGE, Md. Hanif. Weak forms of open and closed functions via θgs-open sets. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 1, n. 12, p. 55–60, 2014. Disponível em: https://jgrma.com/index.php/jgrma/article/view/147. Acesso em: 30 apr. 2025.