@Inproceedings{mineau99conceptual,
  author = {Mineau, Guy and Stumme, Gerd and Wille, Rudolf},
  title  = {Conceptual Structures  Represented by Conceptual Graphs and Formal Concept Analysis},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/ICCS99.pdf},

  const  = {\ text}
}
@Inproceedings{prediger99theory,
  author = {Prediger, S. and Stumme, G.},
  title  = {Theory-Driven Logical Scaling},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/KRDB99.pdf},

  const  = {\ text}
}
@Inproceedings{skorsky1999reuse,
  author = {Skorsky, M. and Stumme, G. and Wille, R. and Wille, U.},
  title  = {Reuse in the Development Process of TOSCANA Systems},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/XPS99.pdf},

  const  = {\ text}
}
@Techreport{stumme99conceptualknowledge,
  author = {Stumme, G.},
  title  = {Conceptual Knowledge Discovery with Frequent Concept Lattices},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P2043.pdf},

  const  = {\ text}
}
@Inproceedings{stumme99hierarchies,
  author = {Stumme, G.},
  title  = {Hierarchies of Conceptual Scales},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/KAW99.pdf},

  const  = {\ text}
}
@Inproceedings{stumme99numerical,
  author = {Stumme, G. and Wolff, K. E.},
  title  = {Numerical Aspects in the Data Model of Conceptual Information Systems},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1998/ER98.pdf},

  const  = {\ text}
}
@Inproceedings{Stumme1999acquiring,
  author = {Stumme, Gerd},
  title  = {Acquiring Expert Knowledge for the Design of Conceptual Information Systems},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P1997-EKAW99.pdf},

  const  = {\ text}
}
@Inproceedings{stumme99dual,
  author = {Stumme, Gerd},
  title  = {Dual Retrieval in Conceptual Information Systems},

  year   = {1999},
  number = {},
  url    = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P2021-BTW99.pdf},

  const  = {\ text}
}