@Article{ 
  ambkir99a,
  author = { Ambrosio, Luigi and Kirchheim, Bernd },
  title = { Currents in Metric Spaces },
  journal = { Acta Mathematica },
  year = { 2000 },
  number = { 185 },
  pages = { 1-80 },
  URL = { http://cvgmt.sns.it/paper/1519/ },
  note = { cvgmt preprint}
}