1.
Younis S, Salih O. The effects of the vision on the central opacity and the positions of the curves invers for the brightness of the assumed elliptic sphere. EDUSJ [Internet]. 2006 Jan. 1 [cited 2025 Aug. 6];18(1):79-96. Available from: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23411