A. Aghajani, and E. Pourhadi. “Common Fixed Points for a Class of Multi-Valued Mappings and Application to Functional Equations Arising in Dynamic Programming”. Malaya Journal of Matematik 2, no. 01 (January 1, 2014): 82–90. Accessed November 22, 2024. https://www.malayajournal.org/index.php/mjm/article/view/394.