Shagari, M.S., I.F. Usamot, Y. Sirajo, and I. A. Fulatan. “New Multi-Valued Contractions With Applications in Dynamic Programming”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 6, no. 2 (February 16, 2021): 925 - 939. Accessed April 30, 2024. http://ijmso.unilag.edu.ng/article/view/1183.