@Article{ 
  abbfig08,
  author = { Abbondandolo, Alberto and Figalli, Alessio },
  title = { Invariant measures of Hamiltonian systems with prescribed asymptotic Maslov index },
  journal = { J. Fixed Point Theory Appl. },
  year = { 2008 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/680/ },
  note = { cvgmt preprint}
}