@Misc{ 
  lacsan10,
  author = { Lachapelle, Aimé and Santambrogio, Filippo },
  title = { On the strategic use of risk and undesirable goods in multidimensional screening },
  journal = { J. Math. Economics },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/270/ },
  note = { cvgmt preprint}
}