%0 Journal Article %A M. S. Agranovich %T General boundary-value problems for integro-differential elliptic systems %J Doklady Akademii Nauk %D 1964 %P 495-498 %V 155 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_3_a0/ %G ru %F DAN_1964_155_3_a0