., Susanth C, and Sunny Joseph Kalayathankal. “On the Sum and Product of Covering Numbers of Graphs and Their Line Graphs”. Communications in Mathematics and Applications 6, no. 1 (August 8, 2015): 9–16. Accessed May 5, 2024. https://www.rgnpublications.com/journals/index.php/cma/article/view/275.