Heim, Bernhard Max Planck Institute for Mathematics, Max Planck Society;
http://dx.doi.org/10.1142/S179304211850077X (Publisher version)
Heim_Hecke’s modular forms by functional equations_Preprint.pdf (Preprint), 123KB
Heim, B. (2018). Hecke’s modular forms by functional equations. International Journal of Number Theory, 14(5), 1247-1256. doi:10.1142/S179304211850077X.