@Misc{ 
  BouCsa19,
  author = { Bousquet, Pierre and Csato, Gyula },
  title = { The equation div$u$+$\langle a, u \rangle=f$ },
  journal = {  },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5331/ },
  note = { cvgmt preprint}
}