%0 Journal Article %A A. S. Sorokin %T Keldysh--Sedov formulas and differentiability with respect to the parameter of families of univalent functions in $n$-connected domains %J Matematičeskie zametki %D 1995 %P 878-889 %V 58 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1995_58_6_a7/ %G ru %F MZM_1995_58_6_a7