TY - JOUR AU - E. V. Zolotareva TI - A necessary and sufficient condition that the Dirichlet problem for a class of elliptic systems be of Fredholm character JO - Doklady Akademii Nauk PY - 1962 SP - 724 EP - 726 VL - 145 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1962_145_4_a5/ LA - ru ID - DAN_1962_145_4_a5 ER -