Explicit Estimates in the Arithmetic Theory of Cusp Forms and Poincaré Series. James Lee Hafner — 1983 Mathematische Annalen
Zeros on the Critical Line for Dirichlet Series Attached to Certain Cusp Forms. James Lee Hafner — 1983 Mathematische Annalen
Zeros on the critical line for Maass wave form L-functions. James Lee Hafner — 1987 Journal für die reine und angewandte Mathematik
Some Remarks on Odd Maass Wave Forms (and a Correction to [1]). James Lee Hafner — 1987 Mathematische Zeitschrift
New Omega Theorems for Two Classical Lattice Points Problems. James Lee Hafner — 1981 Inventiones mathematicae