@Misc{ 
  GraLeo18,
  author = { Gravina, Giovanni and Leoni, Giovanni },
  title = { On the existence and regularity of non-flat profiles for a Bernoulli
  free boundary problem },
  journal = {  },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4036/ },
  note = { cvgmt preprint}
}