TY - JOUR AU - S. M. Ponomarev TI - Plane waves in media with bulk viscosity and hyperbolic systems of JO - Doklady Akademii Nauk PY - 1986 SP - 599 EP - 604 VL - 290 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1986_290_3_a20/ LA - ru ID - DAN_1986_290_3_a20 ER -