TY - JOUR AU - Isaac Efrat TI - Spectral deformations of automorphic functions over graphs of groups. JO - Inventiones mathematicae PY - 1990 SP - 447 VL - 102 IS - 2 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/IM_1990__102_2_143842/ LA - un ID - IM_1990__102_2_143842 ER -