Chowla, S. β€œOn the Congruence &#8721; a<sub>i</sub>x<sub>i</sub><sup>k</Sup> = 0(mod P)”. The Journal of the Indian Mathematical Society 25, no. 1 (March 1, 1961): 47–48. Accessed May 3, 2024. https://informaticsjournals.com/index.php/jims/article/view/16895.