%0 Journal Article %A Mehrmann, Volker %A Xu, Hongguo %T Perturbation of purely imaginary eigenvalues of Hamiltonian matrices under structured perturbations %J The electronic journal of linear algebra %D 2008 %P 234-257 %V 17 %I mathdoc %U http://geodesic.mathdoc.fr/item/ELA_2008__17__a27/ %G en %F ELA_2008__17__a27