- Computation of Language: An Essay on Syntax, Semantics and Pragmatics in Natural Man-Machine Communication
- A Computational Model of Natural Language Communication: Interpretation, Inference, and Production in Database Semantics
- Computational Linguistics and Talking Robots: Processing Content in Database Semantics
- NEWCAT: Parsing Natural Language Using Left-Associative Grammar (Lecture Notes in Computer Science)
- Grundlagen der Computerlinguistik: Mensch-Maschine-Kommunikation in natürlicher Sprache