%0 Journal Article %A K. O. Kurbanov %T Some classes of meromorphic functions characterizable by the spherical derivative %J Doklady Akademii Nauk %D 1974 %P 1305-1308 %V 215 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1974_215_6_a6/ %G ru %F DAN_1974_215_6_a6