@Inproceedings{ganter03creation,
  author = {Ganter, Bernhard and Stumme, Gerd},
  title  = {Creation and Merging of Ontology Top-Levels},

  year   = {2003},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/ganter2003creation.pdf},

  const  = {\ text}
}
@Inproceedings{tane03courseware,
  author = {Tane, Julien and Schmitz, Christoph and Stumme, Gerd and Staab, Steffen and Studer, R.},
  title  = {The Courseware Watchdog:  an Ontology-based tool for finding and organizing
                  learning material},

  year   = {2003},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/2003/tane2003courseware.pdf},

  const  = {\ text}
}