SIEGEL, C. L. A Generalization of the Epstein Zeta Function. The Journal of the Indian Mathematical Society, [S. l.], v. 20, n. 1-3, p. 1–10, 1956. DOI: 10.18311/jims/1956/16981. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/16981. Acesso em: 2 may. 2024.