@Misc{ 
  BraGonIsp22,
  author = { Brasco, Lorenzo and González, Maria del Mar and Ispizua, Mikel },
  title = { A Steklov version of the torsional rigidity },
  journal = { Commun. Contemp. Math },
  year = { 2022 },
  pages = { 36 },
  URL = { http://cvgmt.sns.it/paper/5643/ },
  note = { cvgmt preprint}
}