@Inproceedings{berendt2004roadmap,
  author = {Berendt, Bettina and Hotho, Andreas and Mladenic, Dunja and van Someren, Maarten and Spiliopoulou, Myra and Stumme, Gerd},
  title  = {A Roadmap for Web Mining: From Web to Semantic Web.},

  year   = {2004},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2004/berendt2004roadmap.pdf},

  const  = {\ text}
}
@Proceedings{berendt2004web,

  title  = {Web Mining: From Web to Semantic Web, First European Web
               Mining Forum, EMWF 2003, Cavtat-Dubrovnik, Croatia, September
               22, 2003, Revised Selected and Invited Papers},

  year   = {2004},
  number = {},
  url    = {http://springerlink.metapress.com/content/unvvag26dttf/},

  const  = {\ text}
}
@Inproceedings{cimiano2004concept,
  author = {Cimiano, Philipp and Hotho, Andreas and Stumme, Gerd and Tane, Julien},
  title  = {Conceptual Knowledge Processing with Formal Concept Analysis and Ontologies},

  year   = {2004},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2004/cimiano2004concept.pdf},

  const  = {\ text}
}
@Proceedings{schmidt2004semantische,

  title  = {Semantische Technologien für Informationsportale},
  journal = {LNI},
  year   = {2004},
  number = {},
  url    = {http://www.gi-ev.de/service/publikationen/gi-edition-lecture-notes-in-informatics-lni-2005/mehr-zu-diesem-buch/gi-edition-lecture-notes-in-informatics-lni-p-51/},

  const  = {\ text}
}
@Inproceedings{tane04semantic,
  author = {Tane, Julien and Schmitz, Christoph and Stumme, Gerd},
  title  = {Semantic resource management for the web: an e-learning application},

  year   = {2004},
  number = {},
  url    = {http://www.www2004.org/proceedings/docs/2p1.pdf},

  const  = {\ text}
}