TY - JOUR AU - M. A. Galakhov TI - Non-classical boundary value problems for symmetric linear systems of partial differential equations of the first order JO - Differencialʹnye uravneniâ PY - 1965 SP - 1620 EP - 1627 VL - 1 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1965_1_12_a8/ LA - ru ID - DE_1965_1_12_a8 ER -