D. D. Padma Priya, G. Shobhalatha, and R. Bhuvana Vijaya. “Fuzzyfication of Semigroups”. International Journal of Mathematics And its Applications 4, no. 2 - A (May 1, 2016): 79–83. Accessed July 3, 2024. https://ijmaa.in/index.php/ijmaa/article/view/1008.