C. Sandhya, S. Balasubramanian*, K.A. Venkatesh,. “MINIMAL βg-OPEN SETS AND MAXIMAL βg-CLOSED SETS”. Asian Journal of Current Engineering and Maths 1, no. 5 (October 7, 2013). Accessed May 3, 2024. http://innovativejournal.in/index.php/ajcem/article/view/111.