@Inproceedings{hotho03wordnet,
  author = {Hotho, A and Staab, S. and Stumme, G.},
  title  = {Wordnet improves text document clustering},

  year   = {2003},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/hotho2003wordnet.pdf},

  const  = {\ text}
}
@Inproceedings{hotho03ontologies,
  author = {Hotho, Andreas and Staab, Steffen and Stumme, Gerd},
  title  = {Ontologies improve text document clustering},

  year   = {2003},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/hotho2003ontologies.pdf},

  const  = {\ text}
}