A.B. Hassan. “Studying of Triangle Spread Function for Optical System Includes Square Aperture and Compare With Circular Aperture ”,. Ibn AL-Haitham Journal For Pure and Applied Sciences 18, no. 4 (October 20, 2005). Accessed January 10, 2026. https://jih.uobaghdad.edu.iq/index.php/j/article/view/4396.