%0 Journal Article
%A V. G. Chirskii
%T A generalization of the method of 

%J Zapiski Nauchnykh Seminarov POMI
%D 2005
%P 220-238
%V 322
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_2005_322_a14/
%G ru
%F ZNSL_2005_322_a14