TY - JOUR AU - V. Kh. Froim TI - Regular matrix partial differential equations JO - Differencialʹnye uravneniâ PY - 1969 SP - 100 EP - 107 VL - 5 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1969_5_1_a6/ LA - ru ID - DE_1969_5_1_a6 ER -