« ON THE COMBINATORIAL PROPERTIES OF NILPOTENT AND IDEMPOTENT CONJUGACY CLASSES OF THE INJECTIVE ORDER-DECREASING TRANSFORMATION SEMIGROUP ». FULafia Journal of Science and Technology 1, no. 1 (février 15, 2021): 91–94. Consulté le mai 17, 2026. https://lafiascijournals.org.ng/index.php/fjst/article/view/15.