Ms.V.Kavitha, Dr.R.Govindarajan (2020) “FINITE COPIES OF BARBELL GRAPH AND ITS HARMONIOUS CHROMATIC NUMBER ”, PalArch’s Journal of Archaeology of Egypt / Egyptology, 17(9), pp. 5176–5181. Available at: https://www.archives.palarch.nl/index.php/jae/article/view/4803 (Accessed: 6 November 2025).