@Article{ 
  bramirpal10,
  author = { Bramanti, Marco and Miranda Jr, Michele and Pallara, Diego },
  title = { Two characterization of BV functions on Carnot groups via the heat semigroup },
  journal = { Int. Math. Res. Notices },
  year = { 2012 },
  volume = { 17 },
  pages = { 3845--3876 },
  URL = { http://cvgmt.sns.it/paper/311/ },
  note = { cvgmt preprint}
}