Congruence Zeta Functions for M2 (Q) and Their Associated Modular Forms. J.W. Cogdell — 1984 Mathematische Annalen
Arithmetic cycles on Picard modular surfaces and modular forms of Nebentypus. J.W. Cogdell — 1985 Journal für die reine und angewandte Mathematik
Stability of gamma factors for SO (2n + 1). J.W. Cogdell; I.I. Piatetski-Shapiro — 1998 Manuscripta mathematica