D. K. Thakkar, and P. Jamvecha. “On Ve-Quasi and Secured Ve-Quasi Independent Sets of a Graph”. Malaya Journal of Matematik 8, no. 01 (January 1, 2020): 115–121. Accessed November 23, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1345.