HAUKKANEN, P. Some further arithmetical identities involving a generalization of Ramanujan’s sum. Annales Fennici Mathematici, [S. l.], v. 15, n. 1, p. 37–52, 1990. DOI: 10.5186/aasfm.1990.1513. Disponível em: https://afm.journal.fi/article/view/134676. Acesso em: 25 nov. 2024.