ADIGA, C. “JACOBI’S TWO-SQUARE AND FOUR-SQUARE THEOREMS VIA ROGER’S IDENTITY”. Tamkang Journal of Mathematics 25, no. 1 (June 6, 2021): 37–40. Accessed May 5, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4423.