RESHETUKHA, I. V. Generalized sums for characters and their applications to the reciprocity laws . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 23, n. 2, p. 270–276, 1971. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8514. Acesso em: 6 dec. 2025.