%0 Journal Article
%A S. L. Ziglin
%T Splitting of the separatrices and the nonexistence of first integrals in systems of differential equations of Hamiltonian type with two degrees of freedom
%J Izvestiya. Mathematics 
%D 1988
%P 407-421
%V 31
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1988_31_2_a7/
%G en
%F IM2_1988_31_2_a7