TY - JOUR AU - T. Sh. Kal'menov TI - Selfadjoint boundary value problems for the Tricomi equation JO - Differencialʹnye uravneniâ PY - 1983 SP - 66 EP - 75 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1983_19_1_a9/ LA - ru ID - DE_1983_19_1_a9 ER -