In: Proceedings of the IJCAI Workshop. IJCAI Workshop on Knowledge and Reasoning in Practical Dialogue Systems (KRPD-99), August 2, Stockholm, Sweden, 8/1999.
In: Proceedings of Online 99. European Congress Fair for Technical Communication (ONLINE-99), 22nd, Düsseldorf, Germany, Pages 211-232, Online-Verlag, Velbert, 1999.
International Workshop on Cooperative Information Agents (CIA-1999), co-located with IJCAI, July 31 - August 2, Uppsala, Sweden, Lecture Notes in Computer Science (LNCS), Vol. 1652, Springer-Verlag, 1999.
In: Jos F. Schreinemakers; Jean-Paul Barthès (Hrsg.). Knowledge Management: enterprise, network, and learning. International Symposium on Management of Industrial and Corporate Knowledge (ISMICK), Würzburg: Ergon, Pages 109-116, Advances in Knowledge Management, Vol. 2, 1999.
In: Tapas Kanungo; Henry S. Baird (Hrsg.). Proceedings of the International Workshop on Performance Evaluation Issues in MultiLingual OCR. International Workshop on Performance Evaluation Issues in MultiLingual OCR (MOCR), Bangalore, 9/1999.
In: KnowTechForum´99, International Knowledge Technology Forum, Potsdam, Germany. International Conference on Knowledge Management and Knowledge Technology (KnowTech), 9/1999.