MORDELL, L. J. On Recurrence Formulae for the Number of Classes of Definite Binary Quadratic Forms. The Journal of the Indian Mathematical Society, [S. l.], v. 24, n. 3-4, p. 367–378, 1960. DOI: 10.18311/jims/1960/16937. Disponível em: http://informaticsjournals.com/index.php/jims/article/view/16937. Acesso em: 1 may. 2024.