@Misc{ 
  BraLin22,
  author = { Brasco, Lorenzo and Lindgren, Erik },
  title = { Uniqueness of extremals for some sharp Poincaré-Sobolev constants },
  journal = { Trans. Amer. Math. Soc. },
  year = { 2022 },
  pages = { 39 },
  URL = { http://cvgmt.sns.it/paper/5413/ },
  note = { cvgmt preprint}
}