@Article{ 
  MagCor20,
  author = { Corni, Francesca and Magnani, Valentino },
  title = { Area formula for regular submanifolds of low codimension in Heisenberg groups },
  journal = { Adv. Calc. Var. },
  year = { 2023 },
  volume = { 3 },
  pages = { 665-688 },
  URL = { http://cvgmt.sns.it/paper/4573/ },
  note = { cvgmt preprint}
}