J. Arthy, K. Ramanathan, and K. Manimekalai. “Difference Cordial Labeling of Arrow Graph”. International Journal of Mathematics And its Applications 6, no. 1 (Special Issue) (May 1, 2018): 103–108. Accessed March 12, 2026. http://ijmaa.in/index.php/ijmaa/article/view/1402.