@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}
}