Hai, Trinh, and Le Thuy. “Contraction-Mapping Algorithm for the Equilibrium Problem over the Fixed Point Set of a Nonexpansive Semigroup”. *Mathematical Modelling and Analysis* 24, no. 1 (January 1, 2019): 43-61. Accessed October 13, 2019. https://journals.vgtu.lt/index.php/MMA/article/view/1694.