TY - JOUR AU - Roman Urban TI - Noncoercive differential operators on homogeneous manifolds of negative curvature and their Green functions JO - Colloquium Mathematicum PY - 2001 SP - 121 EP - 134 VL - 88 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm88-1-9/ DO - 10.4064/cm88-1-9 LA - en ID - 10_4064_cm88_1_9 ER -