, Sunoj B S, Mathew Varkey T K. “Square Sum Difference Product Prime Labeling of Some Tree Graphs”. International Journal on Future Revolution in Computer Science & Communication Engineering 3, no. 11 (November 30, 2017): 17–19. Accessed March 1, 2026. http://www.ijfrcsce.org/index.php/ijfrcsce/article/view/258.