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@article{DAN_1983_272_4_a2, author = {G. A. Margulis}, title = {Free completely discontinuous groups of affine transformations}, journal = {Doklady Akademii Nauk}, pages = {785--788}, publisher = {mathdoc}, volume = {272}, number = {4}, year = {1983}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1983_272_4_a2/} }
G. A. Margulis. Free completely discontinuous groups of affine transformations. Doklady Akademii Nauk, Tome 272 (1983) no. 4, pp. 785-788. http://geodesic.mathdoc.fr/item/DAN_1983_272_4_a2/