C. SANDHYA, S. B. MINIMAL GS-OPEN SETS AND MAXIMAL GS-CLOSED SETS. Asian Journal of Current Engineering and Maths, [S. l.], v. 1, n. 2, 2013. Disponível em: http://innovativejournal.in/index.php/ajcem/article/view/38. Acesso em: 8 may. 2024.