%0 Journal Article
%A A. V. Kochergin
%T Time changes in flows and mixing
%J Izvestiya. Mathematics 
%D 1973
%P 1273-1294
%V 7
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1973_7_6_a4/
%G en
%F IM2_1973_7_6_a4