S, Sharmila. ON INTUITIONISTIC FUZZY ζ OPEN SET. Journal of Global Research in Mathematical Archives(JGRMA), [S. l.], v. 2, n. 10, p. 01–10, 2015. Disponível em: https://www.jgrma.com/index.php/jgrma/article/view/257. Acesso em: 9 may. 2025.