@Misc{ 
  var04a,
  author = { Varchon, Nicolas },
  title = { Optimal measures for nonlinear functionals },
  journal = { JOTA },
  year = { 2004 },
  pages = { 15 },
  URL = { http://cvgmt.sns.it/paper/1540/ },
  note = { cvgmt preprint}
}