SIMSEK, Y. On Generalized Hardy Sums $s_5(h, k)$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 10, p. 1434–1440, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3856. Acesso em: 14 apr. 2025.