@Misc{ 
  ScaSci23,
  author = { Scala, Riccardo and Scianna, Giuseppe },
  title = { On the $L^1$-relaxed area of graphs of $BV$ piecewise constant maps taking three values },
  journal = {  },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/6231/ },
  note = { cvgmt preprint}
}