@Article{ 
  chadep04,
  author = { Champion, Thierry and De Pascale, Luigi },
  title = { A principle of comparison with distance functions for absolute minimizers },
  journal = { Journal of Convex Analysis },
  year = { 2007 },
  volume = { 14 },
  number = { 3 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1241/ },
  note = { cvgmt preprint}
}