%0 Journal Article
%A Nguyen Tien Zung
%T The complexity of integrable Hamiltonian systems on a~prescribed three-dimensional constant-energy submanifold
%J Sbornik. Mathematics
%D 1993
%P 507-533
%V 75
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1993_75_2_a10/
%G en
%F SM_1993_75_2_a10