@Inproceedings{hoser2006semantic,
  author = {Hoser, Bettina and Hotho, Andreas and Jäschke, Robert and Schmitz, Christoph and Stumme, Gerd},
  title  = {Semantic Network Analysis of Ontologies},

  year   = {2006},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2006/hoser2006semantic.pdf},

  const  = {\ text}
}
@Article{jws2006Semantic,
  author = {Stumme, Gerd and Hotho, Andreas and Berendt, Bettina},
  title  = {Semantic Web Mining - State of the Art and Future Directions},
  journal = {Journal of Web Semantics},
  year   = {2006},
  number = {2},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2006/stumme2006semantic.pdf},

  const  = {\ text}
}