Tadee, S., & Pintoptang, U. (2023). On the Non-Linear Diophantine Equations $4^{x} - a^{y} = dz^{2}$ and $4^{x} + a^{y} = dz^{2}$. Thai Journal of Mathematics, 21(3), 563–567. Retrieved from https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1527