%0 Journal Article
%A A. D. Bruno
%T The divergence of transformations to normal form of differential equations
%J Doklady Akademii Nauk
%D 1967
%P 1003-1006
%V 174
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_174_5_a1/
%G ru
%F DAN_1967_174_5_a1