TY - JOUR AU - R. S. Saks TI - The Dirichlet problem for a certain class of elliptic systems of second order differential equations JO - Differencialʹnye uravneniâ PY - 1970 SP - 72 EP - 85 VL - 6 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1970_6_1_a7/ LA - ru ID - DE_1970_6_1_a7 ER -