%0 Journal Article
%A S. V. Lapin
%T Differential perturbations and $D_\infty$-differential modules
%J Sbornik. Mathematics
%D 2001
%P 1639-1659
%V 192
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_2001_192_11_a2/
%G en
%F SM_2001_192_11_a2