"ON THE COMBINATORIAL PROPERTIES OF NILPOTENT AND IDEMPOTENT CONJUGACY CLASSES OF THE INJECTIVE ORDER-DECREASING TRANSFORMATION SEMIGROUP" (2021) FULafia Journal of Science and Technology, 1(1), ص 91–94. موجود في: https://lafiascijournals.org.ng/index.php/fjst/article/view/15 (تاريخ الوصول: 17 مايو 2026).