@inproceedings{ls_leimeister,
  address = {Monaco, Monaco},
  author = {Köbler, F. and Koene, P. and Krcmar, H. and Altmann, M. and Leimeister, J. M.},
  booktitle = {2. International Workshop on Near Field Communication (NFC) 2010},
  interhash = {e5a91ccd5416fb912b87186e0316eab8},
  intrahash = {d443fdea0d4b6d9b75285c52f8c0961d},
  note = {180 (28-10)},
  title = {LocaTag - An NFC-based system enhancing instant messaging tools with real-time user location},
  url = {http://www.uni-kassel.de/fb7/ibwl/leimeister/pub/JML_156.pdf},
  volume = 2,
  year = 2010
}

@inproceedings{ls_leimeister,
  address = {Monaco, Monaco},
  author = {Köbler, F. and Koene, P. and Krcmar, H. and Altmann, M. and Leimeister, J. M.},
  booktitle = {2. International Workshop on Near Field Communication (NFC) 2010},
  interhash = {e5a91ccd5416fb912b87186e0316eab8},
  intrahash = {d443fdea0d4b6d9b75285c52f8c0961d},
  note = {180 (28-10)},
  title = {LocaTag - An NFC-based system enhancing instant messaging tools with real-time user location},
  url = {http://pubs.wi-kassel.de/wp-content/uploads/2013/03/JML_219.pdf},
  volume = 2,
  year = 2010
}

@article{leskovec2008planetary,
  author = {Leskovec, J. and Horvitz, E.},
  interhash = {27d7144813bb85492b18cad6cf6525e7},
  intrahash = {958ce0f9954243d9b27e7e7fee063b01},
  publisher = {ACM New York, NY, USA},
  title = {{Planetary-scale views on a large instant-messaging network}},
  url = {http://scholar.google.de/scholar.bib?q=info:dvYmn_qj6NQJ:scholar.google.com/&output=citation&hl=de&as_sdt=2000&ct=citation&cd=0},
  year = 2008
}