%0 Journal Article
%A A. D. Bruno
%T On convergence of transforms of differential equations to the normal form
%J Doklady Akademii Nauk
%D 1965
%P 987-989
%V 165
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1965_165_5_a1/
%G ru
%F DAN_1965_165_5_a1