IbrahimMuhammad Jamilu, Sawudi Ibrahim Mamman, and ImamAbdussamad Tanko. “ON THE SEMIGROUP OF DIFUNCTIONAL BINARY RELATIONS”. FUDMA JOURNAL OF SCIENCES 6, no. 4 (August 15, 2022): 17 - 19. Accessed December 20, 2024. https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/1026.