@Book{balbymarinho2012recommender,
  author = {Balby Marinho, L. and Hotho, A. and Jäschke, R. and Nanopoulos, A. and Rendle, S. and Schmidt-Thieme, L. and Stumme, G. and Symeonidis, P.},
  title  = {Recommender Systems for Social Tagging Systems},

  year   = {2012},
  number = {},
  url    = {http://link.springer.com/book/10.1007/978-1-4614-1894-8},
  doi = {10.1007/978-1-4614-1894-8},
  const  = {\ text}
}
@Incollection{jaeschke2012challenges,
  author = {Jäschke, Robert and Hotho, Andreas and Mitzlaff, Folke and Stumme, Gerd},
  title  = {Challenges in Tag Recommendations for Collaborative Tagging Systems},

  year   = {2012},
  number = {},
  url    = {http://dx.doi.org/10.1007/978-3-642-25694-3_3},
  doi = {10.1007/978-3-642-25694-3_3},
  const  = {\ text}
}
@Inproceedings{krause2008comparison,
  author = {Krause, Beate and Hotho, Andreas and Stumme, Gerd},
  title  = {A Comparison of Social Bookmarking  with Traditional Search},

  year   = {2008},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inproceedings{krause2008logsonomy,
  author = {Krause, Beate and Jäschke, Robert and Hotho, Andreas and Stumme, Gerd},
  title  = {Logsonomy - Social Information Retrieval with Logdata},

  year   = {2008},
  number = {},
  url    = {http://portal.acm.org/citation.cfm?id=1379092.1379123&coll=ACM&dl=ACM&type=series&idx=SERIES399&part=series&WantType=Journals&title=Proceedings%20of%20the%20nineteenth%20ACM%20conference%20on%20Hypertext%20and%20hypermedia},
  doi = {http://doi.acm.org/10.1145/1379092.1379123},
  const  = {\ text}
}
@Inproceedings{krause2008antisocial,
  author = {Krause, Beate and Schmitz, Christoph and Hotho, Andreas and Stumme, Gerd},
  title  = {The Anti-Social Tagger - Detecting Spam in Social Bookmarking Systems},

  year   = {2008},
  number = {},
  url    = {http://airweb.cse.lehigh.edu/2008/submissions/krause_2008_anti_social_tagger.pdf},

  const  = {\ text}
}
@Inproceedings{grahl07conceptualKdml,
  author = {Grahl, Miranda and Hotho, Andreas and Stumme, Gerd},
  title  = {Conceptual Clustering of Social Bookmark Sites},

  year   = {2007},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/hotho/pub/2007/kdml_recommender_final.pdf},

  const  = {\ text}
}
@Inproceedings{grahl2007clustering,
  author = {Grahl, Miranda and Hotho, Andreas and Stumme, Gerd},
  title  = {Conceptual Clustering of Social Bookmarking Sites},

  year   = {2007},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inproceedings{jaeschke07tagKdml,
  author = {Jaeschke, Robert and Marinho, Leandro and Hotho, Andreas and Schmidt-Thieme, Lars and Stumme, Gerd},
  title  = {Tag Recommendations in Folksonomies},

  year   = {2007},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2007/jaeschke07tagrecommendationsKDML.pdf},

  const  = {\ text}
}
@Inproceedings{jaeschke2007analysis,
  author = {Jäschke, Robert and Hotho, Andreas and Schmitz, Christoph and Stumme, Gerd},
  title  = {Analysis of the Publication Sharing Behaviour in BibSonomy},

  year   = {2007},
  number = {},
  url    = {},

  const  = {\ text}
}
@Inproceedings{hotho2006bibsonomy,
  author = {Hotho, Andreas and Jäschke, Robert and Schmitz, Christoph and Stumme, Gerd},
  title  = {BibSonomy: A Social Bookmark and Publication Sharing System},

  year   = {2006},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2006/hotho2006bibsonomy.pdf},

  const  = {\ text}
}