“ Studying of the solvability of the equations X^2-ΔY^2=-3 وَaX^2+2bXY-3aY^2=±1” (2021) Damascus University Journal for the basic sciences, 34(1). Available at: https://journal.damascusuniversity.edu.sy/index.php/basj/article/view/1236 (Accessed: 18 June 2026).