Kadum Abbas Zeyarah, Abdulrahman, and . . “Creation the Overlapping Ordinary Sets by Complementary Approach”. International Journal of Engineering and Technology 7, no. 3.36 (May 6, 2018): 211–217. Accessed May 13, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/29665.