@Article{ 
  TorZil19,
  author = { Tortone, Giorgio and Zilio, Alessandro },
  title = { Regularity results for segregated configurations involving fractional  Laplacian },
  journal = { Nonlinear Analysis },
  year = { 2019 },
  doi = { 10.1016/j.na.2019.05.013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6276/ },
  note = { cvgmt preprint}
}