@Misc{ 
  RaiSpe19,
  author = { Raita, Bogdan and Spector, Daniel },
  title = { A Note on Estimates for Elliptic Systems with $L^1$ Data },
  journal = {  },
  year = { 2019 },
  pages = { 8 pages },
  URL = { http://cvgmt.sns.it/paper/4321/ },
  note = { cvgmt preprint}
}