%0 Journal Article %A M. M. Dzhrbashyan %A A. B. Nersesyan %T Expansions in certain biorthogonal systems and boundary-value problems for differential equations of fractional order %J Trudy Moskovskogo matematičeskogo obŝestva %D 1961 %P 89-179 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1961_10_a2/ %G ru %F MMO_1961_10_a2