TY - JOUR AU - Bachir Bekka AU - Yves Cornulier TI - A spectral gap property for subgroups of finite covolume in Lie groups JO - Colloquium Mathematicum PY - 2010 SP - 175 EP - 182 VL - 118 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm118-1-9/ DO - 10.4064/cm118-1-9 LA - en ID - 10_4064_cm118_1_9 ER -