@article{01875749,
title = {Discrete groups of affine isometries.},
journal = {Journal of Lie Theory},
volume = {9},
year = {1999},
pages = {321-349},
zbl = {1010.22019},
language = {en},
url = {http://dml.mathdoc.fr/item/01875749}
}
Abels, Herbert. Discrete groups of affine isometries.. Journal of Lie Theory, Tome 9 (1999) pp. 321-349. http://gdmltest.u-ga.fr/item/01875749/