%0 Journal Article %A M. M. Dzhrbashyan %T The basis property for biorthogonal systems generated by boundary-value problems for differential operators of fractional order %J Doklady Akademii Nauk %D 1981 %P 1054-1058 %V 261 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_261_5_a6/ %G ru %F DAN_1981_261_5_a6