@Article{ 
  BocPeg17,
  author = { Bochard, Pierre and Pegon, Paul },
  title = { Kinetic selection principle for curl-free vector fields of unit norm },
  journal = { Communications in Partial Differential Equations },
  year = { 2017 },
  doi = { 10.1080/03605302.2017.1358276 },
  volume = { 42 },
  pages = { 1375-1402 },
  URL = { http://cvgmt.sns.it/paper/3573/ },
  note = { cvgmt preprint}
}