TY - JOUR AU - F. E. Lomovtsev AU - K. A. Spesivtseva TI - Mixed Problem for a General 1D Wave Equation with Characteristic Second Derivatives in a Nonstationary Boundary Mode JO - Matematičeskie zametki PY - 2021 SP - 345 EP - 357 VL - 110 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2021_110_3_a2/ LA - ru ID - MZM_2021_110_3_a2 ER -