%0 Journal Article
%A V. S. Matveev
%T Integrable Hamiltonian system with two degrees of freedom. The~topological structure of saturated neighbourhoods of points of focus-focus and saddle-saddle type
%J Sbornik. Mathematics
%D 1996
%P 495-524
%V 187
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1996_187_4_a1/
%G en
%F SM_1996_187_4_a1