%0 Journal Article %A A. B. Antonevich %T Boundary value problems with strong nonlocalness for elliptic equations %J Izvestiya. Mathematics %D 1990 %P 1-21 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1990_34_1_a0/ %G en %F IM2_1990_34_1_a0