%0 Journal Article %A Tsuyumine, Shigeaki %T Automorphy factors for a Hilbert modular group %J Glasgow mathematical journal %D 1988 %P 231-236 %V 30 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007278/ %R 10.1017/S0017089500007278 %F 10_1017_S0017089500007278