%0 Journal Article %A A. L. Skubachevskii %T On Necessary Conditions for the Fredholm Solvability of Nonlocal Elliptic Problems %J Informatics and Automation %D 2008 %P 248-263 %V 260 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2008_260_a16/ %G ru %F TRSPY_2008_260_a16