@Article{ 
  DiFFio19a,
  author = { Di Fratta, Giovanni and Fiorenza, Alberto },
  title = { A short proof of local regularity of distributional solutions of  Poisson's equation },
  journal = { Proc. Amer. Math. Soc. },
  year = { 2020 },
  doi = { https://doi.org/10.1090/proc/14895 },
  volume = { 148 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5113/ },
  note = { cvgmt preprint}
}