@Article{ 
  LogMar14,
  author = { Logaritsch, Philippe and Marchese, Andrea },
  title = { Kirszbraun's extension theorem fails for Almgren's multiple valued functions },
  journal = { Arch. Math },
  year = { 2014 },
  doi = { 10.1007/s00013-014-0642-4 },
  volume = { 102 },
  number = { 5 },
  pages = { 455-458 },
  URL = { http://cvgmt.sns.it/paper/2393/ },
  note = { cvgmt preprint}
}