@Misc{ 
  fig08,
  author = { Figalli, Alessio },
  title = { A geometric lower bound on Grad's number },
  journal = { ESAIM Control Optim. Calc. Var. },
  year = { 2008 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/172/ },
  note = { cvgmt preprint}
}