@InExtendedAbstractswiethoff2011solofind,
  author = {Alexander Wiethoff, Gregor Broll},
  title  = "{SoloFind: Chains of Interactions with a Mobile Retail Experience System}",
  booktitle = {Extended Abstracts of the 29th ACM International Conference on Human Factors in Computing Systems - CHI 2011, Vancouver, BC, Canada, May 2011},
  month = may,
  year =   {2011},
  organization={ACM}
  }