C. Jayasekaran, A. Vinoth Kumar, M. Ashwin Shijo. 2-Vertex self switching of umbrella graph. Malaya J. Mat. [Internet]. 2020 Oct. 1 [cited 2024 Jul. 16];8(04):2359-68. Available from: https://www.malayajournal.org/index.php/mjm/article/view/1920