MAAS, Hans. Modulformen zu indefiniten quadratischen Formen. Mathematica Scandinavica, Berkeley, CA, United States, v. 17, p. 41–55, 1965. DOI: 10.7146/math.scand.a-10762. Disponível em: https://journals.msp.org/mscand/article/view/2563. Acesso em: 25 jul. 2026.