@Misc{ 
  MaiTorVel22,
  author = { Maiale, Francesco Paolo and Tortone, Giorgio and Velichkov, Bozhidar },
  title = { The boundary Harnack principle on optimal domains },
  journal = {  },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5536/ },
  note = { cvgmt preprint}
}