@Article{ 
  DavSic9,
  author = { Davini, Andrea and Siconolfi, Antonio },
  title = { Metric techniques for convex stationary ergodic Hamiltonians },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2011 },
  volume = { 40 },
  number = { 3-4 },
  pages = { 391–421 },
  URL = { http://cvgmt.sns.it/paper/6140/ },
  note = { cvgmt preprint}
}