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, vol. 36, no. 2, Apr. 2023, pp. 375-82, https://doi.org/10.30526/36.2.3025.