@Misc{ 
  FigKimMcC13,
  author = { Figalli, Alessio and Kim, Young-Heon and McCann, Robert J. },
  title = { Hölder continuity and injectivity of optimal maps },
  journal = { Arch. Ration. Mech. Anal. },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2109/ },
  note = { cvgmt preprint}
}