%0 Journal Article
%A I. V. Mykytyuk
%A A. M. Stepin
%T A sufficient condition for reduction by stages: proof and applications
%J Sbornik. Mathematics
%D 2008
%P 663-671
%V 199
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2008_199_5_a2/
%G en
%F SM_2008_199_5_a2