%0 Journal Article %A Tatsuya Kawabe %T On the properly discontinuous subgroups of affine motions. %J Manuscripta mathematica %D 1998 %P 529-544 %V 95 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156393/ %F MM2_1998__95_3_156393