@Article{ 
  AmbDIM12,
  author = { Ambrosio, Luigi and Di Marino, Simone },
  title = { Equivalent definitions of $BV$ space and of total variation on metric measure spaces },
  journal = { J. Funct. Anal. },
  year = { 2014 },
  volume = { 266 },
  number = { 7 },
  pages = { 4150-4188 },
  URL = { http://cvgmt.sns.it/paper/1860/ },
  note = { cvgmt preprint}
}