Rajan, M. A., N. M. Kembhavimath, and V. Lokesha. “On Study of Vertex Labeling of Graph Operations”. Journal of Scientific Research 3, no. 2 (April 28, 2011): 291–301. Accessed November 28, 2024. https://banglajol.info/index.php/JSR/article/view/6222.