%0 Journal Article
%A E. A. Fomina
%T A~criterion of an infinitely narrow field
%J Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika
%D 2009
%P 27-30
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VTGU_2009_1_a3/
%G ru
%F VTGU_2009_1_a3