TY - JOUR AU - I. R. Valitov AU - A. I. Kozhanov TI - Inverse problems for hyperbolic equations: the case of unknown time-dependent coefficients JO - Sibirskij žurnal čistoj i prikladnoj matematiki PY - 2006 SP - 43 EP - 59 VL - 6 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VNGU_2006_6_1_a2/ LA - ru ID - VNGU_2006_6_1_a2 ER -