%0 Journal Article
%A G. V. Kuz'mina
%T The module method and some extremal problems in the class~$\Sigma(r)$
%J Zapiski Nauchnykh Seminarov POMI
%D 2013
%P 136-152
%V 418
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2013_418_a8/
%G ru
%F ZNSL_2013_418_a8