“Quasi-Equilibrium Problems and Fixed Point Theorems of the Sum of l.s.c. and u.s.c. Mappings”, JMTA, vol. 3, no. 1, pp. 57–72, Jan. 2018, Accessed: Apr. 01, 2026. [Online]. Available: https://journalmta.com/index.php/jmta/article/view/37