%0 Journal Article %A V. A. Il'in %T The Riesz basis property for systems of root vector functions for a discontinuous Schr\"odinger operator with matrix potential %J Doklady Akademii Nauk %D 1990 %P 59-62 %V 314 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_314_1_a13/ %G ru %F DAN_1990_314_1_a13