F. Lehmann, and R. Wille. Conceptual Structures: Applications, Implementation and Theory, volume 954 of Lecture Notes in Computer Science, Springer, (1995)
F. Lehmann. Proceedings of the Third International Workshop on
PEIRCE: A Conceptual Graphs Workbench, University of Maryland,
Maryland, August 19, 1994, (1994)
T. Lehmann, and A. Karcher. Invited session of the Ontology Driven Interoperability for Agile
Applications using Information Systems: Requirements and Applications
for Agent Mediated Decision Support- WMSCI 2006, (2006)
J. Lehmann, and J. Breuker. Legal Knowledge and Information Systems. Jurix 2000: The Thirteenth
Annual Conference, page 123-131. Amsterdam, IOS Press, (2000)
J. Lehmann. Proceedings of the 10th International Workshop on Database and Expert
Systems Applications, page 780-784. Los Alamitos, IEEE Computer Society, (1999)
A. Gangemi, C. Catenaccia, M. Ciaramita, and J. Lehmann. Proceedings of the 4th International Workshop on Evaluation of Ontologies for the Web (EON2006) at the 15th International World Wide Web Conference (WWW 2006), page 8-15. Edinburgh, Scotland, (May 2006)