@Article{ 
  DavZav13,
  author = { Davini, Andrea and Zavidovique, Maxime },
  title = { On the (non) existence of viscosity solutions of multi-time  Hamilton-Jacobi equations },
  journal = { J. Differential Equations },
  year = { 2015 },
  volume = { 258 },
  number = { 2 },
  pages = { 362–378 },
  URL = { http://cvgmt.sns.it/paper/6136/ },
  note = { cvgmt preprint}
}