Kongban, Chayut, Poom Kumam, and Juan Martí­nez-Moreno. “Coupled Random Fixed Point Theorems for Mixed Monotone Nonlinear Operators”. Communications in Mathematics and Applications 10, no. 2 (June 30, 2019): 215–229. Accessed October 26, 2025. https://www.journals.rgnpublications.com/index.php/cma/article/view/1083.