ELAGAN, Sayed Khalil, and Rabha Waell IBRAHIM. 2014. “Fuzzy and L-Fuzzy Subset in a Locally Convex Topology”. Walailak Journal of Science and Technology (WJST) 12 (11):1075-81. https://wjst.wu.ac.th/index.php/wjst/article/view/906.