MAAS, H. Modulformen zu indefiniten quadratischen Formen. MATHEMATICA SCANDINAVICA, [S. l.], v. 17, p. 41–55, 1965. DOI: 10.7146/math.scand.a-10762. Disponível em: https://www.mscand.dk/article/view/10762. Acesso em: 4 may. 2024.