Pengelley, David. “Sums of Numerical Powers in Discrete Mathematics: Archimedes Sums Squares in the Sand”. Annals of the TRIUMPHS Society 1, no. 2 (December 29, 2025). Accessed May 24, 2026. https://triumphsannals.journals.publicknowledgeproject.org/index.php/triumphsannals/article/view/16843.