@Misc{ 
  HasSif19,
  author = { Hassannezhad, Asma and Siffert, Anna },
  title = { Escobar constants of planar domains },
  journal = {  },
  year = { 2019 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4927/ },
  note = { cvgmt preprint}
}