Sumathi, M.P., and Anwar Alwardi. “Further Results on Designs Arising from Some Certain Corona Graphs”. Journal of Advances in Applied & Computational Mathematics 2, no. 1 (April 2, 2015): 19–23. Accessed May 21, 2022. https://www.avantipublishers.com/index.php/jaacm/article/view/197.