%0 Journal Article %A M. M. Dzhrbashyan %A A. B. Nersesyan %T Expansion in special biorthogonal systems and boundary value problems for fractional-order differential equations %J Doklady Akademii Nauk %D 1960 %P 747-750 %V 132 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_132_4_a3/ %G ru %F DAN_1960_132_4_a3