%0 Journal Article
%A L.H. Eliasson
%T Normal forms for Hamiltonian systems with Poisson commuting integrals - elliptic case.
%J Commentarii mathematici Helvetici
%D 1990
%P 4-35
%V 65
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140179/
%F CMH_1990__65_3_140179