Gopalan, M., Kavitha, A. and Mary, A. 2017. ON THE POSITIVE PELL EQUATION y^2 = 72x^2 + 36. International Journal of Research -GRANTHAALAYAH. 5, 7(SE) (Jul. 2017), 68–74. DOI:https://doi.org/10.29121/granthaalayah.v5.i7(SE).2017.2126.