Ibrahim, A., S. B. Oluwafemi, B. S. Musa, J. C. Ahmadu, and K. S. Agwazah. “Tropical Polynomial of Partial Contraction Transformation Semigroup”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 9, no. 2 (December 5, 2023): 102 - 120. Accessed November 22, 2024. http://ijmso.unilag.edu.ng/article/view/2001.