TY - JOUR AU - V. A. Eleev AU - S. K. Kumykova AU - V. N. Lesev TI - On problems of the type of the Bitsadze-Samarsky problem for mixed equations with perpendicular lines of degeneracy JO - News of the Kabardin-Balkar scientific center of RAS PY - 2000 SP - 35 EP - 40 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IZKAB_2000_1_a2/ LA - ru ID - IZKAB_2000_1_a2 ER -