@Article{ 
  pra04a,
  author = { Pratelli, Aldo },
  title = { On the equality between Monge's infimum and Kantorovich's minimum in optimal mass transportation },
  journal = { Ann. Inst. H. Poincare' Probab. Statist. },
  year = { 2005 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/971/ },
  note = { cvgmt preprint}
}