@Misc{ 
  DiDFäs20,
  author = { Di Donato, Daniela and Fässler, Katrin },
  title = { Extensions and corona decompositions of low-dimensional intrinsic
  Lipschitz graphs in Heisenberg groups },
  journal = {  },
  year = { 2020 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5066/ },
  note = { cvgmt preprint}
}