KÁTAI, I. Some remarks on additive arithmetical functions. Lithuanian Mathematical Journal, [S. l.], v. 9, n. 3, p. 515–518, 1969. DOI: 10.15388/LMJ.1969.20799. Disponível em: https://journals.vu.lt./LMJ/article/view/20799. Acesso em: 26 apr. 2025.