Indira, Dr. T., and S. Geetha. “PG and Research Department of Mathematics, Seethalakshmi Ramaswami College, Trichy-2.”. International Journal Of Mathematics And Computer Research 3, no. 11 (November 10, 2015): 1191-1195. Accessed May 18, 2024. http://ijmcr.in/index.php/ijmcr/article/view/145.