Mahammad, A.T., and M. J. Mahammad. “New Kinds of Blocking Sets in a Projective Plane PG(2,q)”. Ibn AL-Haitham Journal For Pure and Applied Sciences 22, no. 3 (August 9, 2017). Accessed March 31, 2025. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1201.