@Article{ 
  DavZav11,
  author = { Davini, Andrea and Zavidovique, Maxime },
  title = { Weak KAM theory for nonregular commuting Hamiltonians },
  journal = { Discrete Contin. Dyn. Syst. Ser. },
  year = { 2013 },
  volume = { 18 },
  number = { 1 },
  pages = { 57–94 },
  URL = { http://cvgmt.sns.it/paper/6139/ },
  note = { cvgmt preprint}
}