@article{TM_2016_292_a16,
     author = {George Tomanov},
     title = {Properly discontinuous group actions on affine homogeneous spaces},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {268--279},
     year = {2016},
     volume = {292},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_2016_292_a16/}
}