%0 Journal Article %A A. V. Glushak %A H. K. Avad %T On the solvability of an abstract differential equation of fractional order with a~variable operator %J Contemporary Mathematics. Fundamental Directions %D 2013 %P 18-32 %V 47 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2013_47_a1/ %G ru %F CMFD_2013_47_a1