TY - JOUR AU - Zimmer, Robert J. TI - Discrete groups and non-Riemannian homogeneous spaces JO - Journal of the American Mathematical Society PY - 1994 SP - 159 EP - 168 VL - 07 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1994-1207014-8/ DO - 10.1090/S0894-0347-1994-1207014-8 ID - 10_1090_S0894_0347_1994_1207014_8 ER -