@Article{ 
  PalPic22,
  author = { Palatucci, Giampiero and Piccinini, Mirco },
  title = { Nonlocal Harnack inequalities in the Heisenberg group },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2022 },
  doi = { https://doi.org/10.1007/s00526-022-02301-9 },
  volume = { 61 },
  number = { Art. 185 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5663/ },
  note = { cvgmt preprint}
}