@Misc{ 
  figkimmcc11,
  author = { Figalli, Alessio and Kim, Young-Heon and McCann, Robert J. },
  title = { Regularity of optimal transport maps on multiple products of spheres },
  journal = { J. Eur. Math. Soc. (JEMS) },
  year = { 2011 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/766/ },
  note = { cvgmt preprint}
}