lakshmi, viji, and K. Thilagavathi. “A Note on B-Chromatic Number of the Transformation Graph G++- and Corona Product of Graphs”. International Journal of Applied Mathematical Research 1, no. 4 (September 26, 2012): 715–725. Accessed May 2, 2024. https://www.sciencepubco.com/index.php/ijamr/article/view/319.