Ananda Rao, K. β€œOn the Summation of Singular Series Associated With Certain Quadratic Forms (I)”. The Journal of the Indian Mathematical Society 23, no. 1-2 (June 1, 1959): 65–96. Accessed May 5, 2024. https://www.informaticsjournals.com/index.php/jims/article/view/16920.