TY - JOUR AU - M. S. Salakhitdinov AU - B. Mengziyaev TI - A certain boundary value problem with shift for a mixed type equation with two lines of degeneracy JO - Differencialʹnye uravneniâ PY - 1977 SP - 133 EP - 139 VL - 13 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1977_13_1_a18/ LA - ru ID - DE_1977_13_1_a18 ER -