Gopalan M, Kavitha A, Mary A. ON THE POSITIVE PELL EQUATION y^2 = 72x^2 + 36. Int. J. Res. Granthaalayah [Internet]. 2017 Jul. 31 [cited 2024 Jul. 3];5(7(SE):68-74. Available from: https://granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG17_SE08_10