TY - JOUR AU - V. V. Varlamov TI - On a hyperbolic equation that describes wave processes in media JO - Doklady Akademii Nauk PY - 1990 SP - 28 EP - 32 VL - 314 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a5/ LA - ru ID - DAN_1990_314_1_a5 ER -