@Article{ 
  Tor20,
  author = { Tortone, Giorgio },
  title = { The nodal set of solutions to some nonlocal sublinear problems },
  journal = { Calculus of Variations and Partial Differential Equations },
  year = { 2020 },
  doi = { 10.1007/s00526-022-02197-5 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6274/ },
  note = { cvgmt preprint}
}