Studying of the solvability of the equations X^2-ΔY^2=-3 وَaX^2+2bXY-3aY^2=±1. مجلة العلوم الأساسية. 2021;34(1). Accessed June 18, 2026. https://journal.damascusuniversity.edu.sy/index.php/basj/article/view/1236