%0 Journal Article %A Yu. I. Sapronov %T Nonlocal finite dimensional reductions in variational boundary value problems %J Matematičeskie zametki %D 1991 %P 94-103 %V 49 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1991_49_1_a11/ %G ru %F MZM_1991_49_1_a11