Ms.V.Kavitha, Dr.R.Govindarajan. “FINITE COPIES OF BARBELL GRAPH AND ITS HARMONIOUS CHROMATIC NUMBER”. PalArch’s Journal of Archaeology of Egypt / Egyptology 17, no. 9 (November 2, 2020): 5176–5181. Accessed July 9, 2026. https://archives.palarch.nl/index.php/jae/article/view/4803.