Derivation Power Sums of Even Integer Number Formula. Baghdad Science Journal, Iraq, Baghdad, v. 10, n. 2, p. 301–318, 2013. DOI: 10.21123/bsj.2013.10.2.301-318. Disponível em: https://bsj-ojs.uobaghdad.edu.iq/index.php/BSJ/article/view/1454.. Acesso em: 18 jun. 2025.