%0 Journal Article %A G. V. Kuz'mina %T The problems of extremal decomposition, and the coefficient inequalities in the class~$\Sigma(r)$ %J Zapiski Nauchnykh Seminarov POMI %D 1991 %P 101-116 %V 196 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1991_196_a7/ %G ru %F ZNSL_1991_196_a7