@Misc{ 
  Bar13c,
  author = { Baroni, Paolo },
  title = { New contributions to nonlinear Calderón-Zygmund theory },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2508/ },
  note = { cvgmt preprint}
}