%0 Journal Article
%A Giorgilli, Antonio
%T Rigorous results on the power expansions for the integrals of a hamiltonian system near an elliptic equilibrium point
%J Annales de l'I.H.P. Physique théorique
%D 1988
%P 423-439
%V 48
%N 4
%I Gauthier-Villars
%U http://www.numdam.org/item/AIHPA_1988__48_4_423_0/
%G en
%F AIHPA_1988__48_4_423_0