Ali, B., M. Yahuza, and A. T. Imam. “On Quasi-Nilpotents in Finite Partial Transformation Semigroups”. International Journal of Mathematical Sciences and Optimization: Theory and Applications 11, no. 2 (August 12, 2025): 55 - 61. Accessed August 21, 2025. https://ijmso.unilag.edu.ng/article/view/2703.