%0 Journal Article
%A V. I. Berdyshev
%T Linear approximation of vector functions
%J Trudy Instituta matematiki i mehaniki
%D 2014
%P 38-43
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2014_20_4_a3/
%G ru
%F TIMM_2014_20_4_a3