TY - JOUR AU - T. Sh. Kal'menov AU - M. A. Sadybekov TI - The Dirichlet problem and nonlocal boundary value problems for the wave equation JO - Differencialʹnye uravneniâ PY - 1990 SP - 60 EP - 65 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1990_26_1_a7/ LA - ru ID - DE_1990_26_1_a7 ER -