@Misc{ 
  FerPisVol23,
  author = { Ferone, Vincenzo and Piscitelli, Gianpaolo and Volzone, Bruno },
  title = { Symmetrization results for general nonlocal linear ellipitic and
  parabolic problems },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6440/ },
  note = { cvgmt preprint}
}