PENGELLEY, David. Sums of Numerical Powers in Discrete Mathematics: Archimedes Sums Squares in the Sand. Annals of the TRIUMPHS Society, [S. l.], v. 1, n. 2, 2025. Disponível em: https://triumphsannals.journals.publicknowledgeproject.org/index.php/triumphsannals/article/view/16843. Acesso em: 24 may. 2026.