@Article{ 
  KorKuuPal16,
  author = { Korvenpaa, Janne and Kuusi, Tuomo and Palatucci, Giampiero },
  title = { Hölder continuity up to the boundary for a class of fractional obstacle problems },
  journal = { Atti Accad. Naz. Lincei Rend. Lincei Mat. Appl. },
  year = { 2016 },
  doi = { 10.4171/RLM/739 },
  volume = { 27 },
  pages = { 355--367 },
  URL = { http://cvgmt.sns.it/paper/2970/ },
  note = { cvgmt preprint}
}