%0 Journal Article %A G. V. Virabyan %T The spectral equivalence of two operators generated by a certain class of Sobolev's differential equation systems %J Doklady Akademii Nauk %D 1960 %P 1238-1241 %V 132 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_132_6_a3/ %G ru %F DAN_1960_132_6_a3