@Misc{ 
  fatfigrif,
  author = { Fathi, Albert and Figalli, Alessio and Rifford, Ludovic },
  title = { On the Hausdorff Dimension of the Mather Quotient },
  journal = { Comm. Pure Appl. Math. },
  year = { 2008 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/203/ },
  note = { cvgmt preprint}
}