%0 Journal Article
%A Yu. A. Dubinskii
%T The necessity of Kovalevskaya conditions, and their
%J Doklady Akademii Nauk
%D 1989
%P 268-271
%V 304
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1989_304_2_a1/
%G ru
%F DAN_1989_304_2_a1