Zeros on the Critical Line for Dirichlet Series Attached to Certain Cusp Forms. James Lee Hafner (1983) Mathematische Annalen
Zeta-functions, Lambert series and arithmetic functions analogous to Ramanujan's ...-function. II. Koji Katayama (1976) Journal für die reine und angewandte Mathematik
Zeta-functions, Lambert series and arithmetic functions analogous to Ramanujan's ...-function. I. Koji Katayama (1974) Journal für die reine und angewandte Mathematik
Zeta-Functions of Binary Hermitian Forms and Special Values of Eisenstein Series on Three-Dimensional Hyperbolic Space. Jürgen Elstrodt, Fritz Grunewald, Jens Mennicke (1987) Mathematische Annalen