@mastersthesis{rezane2006bibsonomy,
  author = {Rezane, Serak},
  title = {Folksonomies in Intranets},
  school = {University of Kassel},
  year = {2006}
}

@proceedings{conf/iccs/2005,,
  title = {Conceptual Structures: Common Semantics for Sharing Knowledge, 13th International Conference on Conceptual Structures, ICCS 2005, Kassel, Germany, July 17-22, 2005, Proceedings},
  booktitle = {ICCS},
  publisher = {Springer},
  year = {2005},
  volume = {3596},
  url = {http://www.kde.cs.uni-kassel.de/conf/iccs05}
}

@proceedings{dau05contributions,,
  title = {Contributions to ICCS 2005},
  booktitle = {Contributions to ICCS 2005},
  publisher = {kassel university press},
  year = {2005},
  url = {http://www.kde.cs.uni-kassel.de/conf/iccs05}
}

@book{imhof1997kassel,
  author = {Imhof, Michael},
  title = {Kassel : Stadtführer},
  publisher = {Imhof},
  year = {1997},
  url = {http://www.amazon.de/Kassel-Stadtf%C3%BChrer-Michael-Imhof/dp/3932526074/ref=sr_1_1?s=books&ie=UTF8&qid=1435743690&sr=1-1&keywords=kassel}
}