@Misc{ 
  PinVecBia21,
  author = { Biagi, Stefano and Pinamonti, Andrea and Vecchi, Eugenio },
  title = { Sublinear equations driven by Hormander operators },
  journal = { Journal Geometric Analysis },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5136/ },
  note = { cvgmt preprint}
}