TY - JOUR AU - Ch. T. Nguyen TI - A problem of Tricomi type for the Lavrent'ev--Bitsadze equation in a domain with an infinite set of characteristic triangles JO - Differencialʹnye uravneniâ PY - 1982 SP - 81 EP - 92 VL - 18 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1982_18_1_a8/ LA - ru ID - DE_1982_18_1_a8 ER -