@article{SM_1971_14_2_a4,
     author = {V. V. Gorbatsevich},
     title = {Discrete subgroups of solvable {Lie} groups of type~$(E)$},
     journal = {Sbornik. Mathematics},
     pages = {233--251},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_14_2_a4/}
}