Singh, R. N. “The Diophantine Equation y<sup>2</sup> = Dx<sup>4</Sup>+1”. The Journal of the Indian Mathematical Society 53, no. 1-4 (December 1, 1988): 245–250. Accessed April 29, 2024. https://www.informaticsjournals.com/index.php/jims/article/view/22017.