@Misc{ 
  deprig10,
  author = { De Pascale, Luigi and Rigot, Severine },
  title = { Monge's transport problem in the Heisenberg group },
  journal = { Adv. in Calc. Var. },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/259/ },
  note = { cvgmt preprint}
}