Jabbar Sharif Radhi, and Emad Bakr Al-Zangana. “Extension of Cap by Size and Degree in the Space PG(3,11)‎”. Ibn AL-Haitham Journal For Pure and Applied Sciences 36, no. 2 (April 20, 2023): 375–382. Accessed April 30, 2025. https://www.jih.uobaghdad.edu.iq/index.php/j/article/view/3025.