%0 Journal Article
%A Joyal, Pierre
%T Invariance of Poincaré-Lyapunov polynomials under the group of rotations
%J Electronic Journal of Differential Equations
%D 1998
%V 1998
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_1998__1998__a4/
%G en
%F EJDE_1998__1998__a4