Banyan Ibrahim Al-Salim, Amani, and أمانی. “Minimal Blocking Set of Size (30) in PG (2,19) Plane”. Journal of Education and Science (JES) 25, no. 3 (September 1, 2012): 191–205. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17989.