A. Iampan, “Fuzzification of Ideals and Filters in $\Gamma$-Semigroups”, Armen.J.Math., vol. 4, no. 1, pp. 44–48, May 2012, Accessed: Apr. 04, 2025. [Online]. Available: https://armjmath.sci.am/index.php/ajm/article/view/83