1.
Hur Majeed T, Hussain Ali D. Certain Types of Groupoids. J. Al-Qadisiyah Comp. Sci. Math. [Internet]. 2019 Aug. 21 [cited 2025 Apr. 3];11(2):math 10-19. Available from: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/543