@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}
}
@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{agarwal03semantic,
  author = {Agarwal, Sudhir and Fankhauser, Peter and Gonzalez-Ollala, Jorge and Hartmann, Jens and Hollfelder, Silvia and Jameson, Anthony and Klink, Stefan and Lehti, Patrick and Ley, Michael and Rabbidge, Emma and Schwarzkopf, Eric and Shrestha, Nitesh and Stojanovic, Nenad and Studer, Rudi and Stumme, Gerd and Walter, Bernd},
  title  = {Semantic Methods and Tools for Information Portals},

  year   = {2003},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/agarwal2003semantic.pdf},

  const  = {\ text}
}
@Inproceedings{gonzalez02semantic,
  author = {Gonzalez-Olalla, J. and Stumme, G.},
  title  = {Semantic Methods and Tools for Information Portals - The SemIPort Project (Project Description)},

  year   = {2002},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2002/gonzalez2002semantic.pdf},

  const  = {\ text}
}
@Inproceedings{hartmann02semanticweb,
  author = {Hartmann, J. and Hotho, A. and Stumme, G.},
  title  = {Semantic Web Mining for Building Information Portals (Position Paper)},

  year   = {2002},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2002/hartmann2002semanticweb.pdf},

  const  = {\ text}
}