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@article{MM2_1998__95_3_156393, author = {Tatsuya Kawabe}, title = {On the properly discontinuous subgroups of affine motions.}, journal = {Manuscripta mathematica}, pages = {529--544}, publisher = {mathdoc}, volume = {95}, number = {3}, year = {1998}, zbl = {0899.22010}, url = {http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156393/} }
Tatsuya Kawabe. On the properly discontinuous subgroups of affine motions.. Manuscripta mathematica, Tome 95 (1998) no. 3, pp. 529-544. http://geodesic.mathdoc.fr/item/MM2_1998__95_3_156393/