@inproceedings{mineau99conceptual,
  author = {Mineau, Guy and Stumme, Gerd and Wille, Rudolf},
  title = {Conceptual Structures  Represented by Conceptual Graphs and Formal Concept Analysis},
  booktitle = {Conceptual Structures: Standards  and  Practices. Proc. ICCS '99},
  publisher = {Springer},
  year = {1999},
  volume = {1640},
  pages = {423-441},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/ICCS99.pdf}
}

@inproceedings{prediger99theory,
  author = {Prediger, S. and Stumme, G.},
  title = {Theory-Driven Logical Scaling},
  booktitle = {Proc. 6th Intl. Workshop Knowledge Representation Meets Databases (KRDB'99)},
  year = {1999},
  volume = {CEUR Workshop Proc. 21},
  note = {Also in: P. Lambrix et al (Eds.): Proc. Intl. Workshop on Description Logics (DL'99). CEUR Workshop Proc. 22, 1999
                  \url{http://ceur-ws.org/Vol-21}},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/KRDB99.pdf}
}

@inproceedings{skorsky1999reuse,
  author = {Skorsky, M. and Stumme, G. and Wille, R. and Wille, U.},
  title = {Reuse in the Development Process of {TOSCANA} Systems},
  booktitle = {Proc. Workshop on Knowledge Management, Organizational Memory and Reuse, 5th German Conf. on},
  year = {1999},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/XPS99.pdf}
}

@techreport{stumme99conceptualknowledge,
  author = {Stumme, G.},
  title = {Conceptual Knowledge Discovery with Frequent Concept Lattices},
  year = {1999},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P2043.pdf}
}

@inproceedings{stumme99hierarchies,
  author = {Stumme, G.},
  title = {Hierarchies of Conceptual Scales},
  booktitle = {Proc.Workshop on Knowledge Acquisition, Modeling and Management (KAW'99)},
  publisher = {Banff},
  year = {1999},
  volume = {2},
  pages = {78-95},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/KAW99.pdf}
}

@inproceedings{stumme99numerical,
  author = {Stumme, G. and Wolff, K. E.},
  title = {Numerical Aspects in the Data Model of Conceptual Information Systems},
  booktitle = {Advances in Database Technologies. Proc. Intl. Workshop on Data Warehousing and},
  publisher = {Springer},
  year = {1999},
  volume = {1552},
  pages = {117-128},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1998/ER98.pdf}
}

@inproceedings{Stumme1999acquiring,
  author = {Stumme, Gerd},
  title = {Acquiring Expert Knowledge for the Design of Conceptual Information Systems},
  booktitle = {Knowledge Acquisition, Modeling, and Management. Proc. 11th European},
  publisher = {Springer},
  year = {1999},
  volume = {1621},
  pages = {275-290},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P1997-EKAW99.pdf}
}

@inproceedings{stumme99dual,
  author = {Stumme, Gerd},
  title = {Dual Retrieval in Conceptual Information Systems},
  booktitle = {Datenbanksysteme in Büro, Technik und Wissenschaft. Proc. BTW'99},
  year = {1999},
  pages = {328-342},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1999/P2021-BTW99.pdf}
}