%0 Journal Article %A H.G. Grundman %T On the classification of Hilbert Modular threefolds. %J Manuscripta mathematica %D 1991 %P 297-306 %V 72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1991__72_1_155644/ %F MM2_1991__72_1_155644