Usha, K. K., and K. A. Germina. “Complementary Eccentric Uniform Labeling Graphs”. Journal of Informatics and Mathematical Sciences 8, no. 3 (November 9, 2016): 175–181. Accessed April 29, 2024. http://www.rgnpublications.com/journals/index.php/jims/article/view/405.