@Article{ 
  delrob10,
  author = { De Lellis, Camillo and Robyr, Roger },
  title = { Hamilton-Jacobi equations with obstacles },
  journal = { Arch. Ration. Mech. Anal. },
  year = { 2011 },
  volume = { 200 },
  number = { 3 },
  pages = { 1051-1073 },
  URL = { http://cvgmt.sns.it/paper/1194/ },
  note = { cvgmt preprint}
}