@Misc{ 
  FigKimMcC13a,
  author = { Figalli, Alessio and Kim, Young-Heon and McCann, Robert  J. },
  title = { On supporting hyperplanes to convex bodies },
  journal = { Methods Appl. Anal. },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2167/ },
  note = { cvgmt preprint}
}