@Misc{ 
  BelScaSci23,
  author = { Bellettini, Giovanni and Scala, Riccardo and Scianna, Giuseppe },
  title = { Upper bounds for the relaxed area of $S^1$-valued Sobolev maps and its countably subadditive interior envelope },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6115/ },
  note = { cvgmt preprint}
}