J. C. Kanani, and V. J. Kaneria. “Graceful Labeling of Combination Graph Derived by Coupling a Graph With Quadrilateral Snake”. Malaya Journal of Matematik 9, no. 01 (January 1, 2021): 945–949. Accessed November 24, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1202.