@Article{ 
  DeLIgn14,
  author = { De Lellis, Camillo and Ignat, Radu },
  title = { A regularizing property of the 2d-eikonal equation },
  journal = { Comm. Partial Differential Equations },
  year = { 2015 },
  volume = { 40 },
  pages = { 1543–1557 },
  URL = { http://cvgmt.sns.it/paper/2510/ },
  note = { cvgmt preprint}
}