CONSTRUCTOR: A natural language interface based on attribute grammars. First Finnish-Hungarian Workshop on Programming Languages and Software Tools. :135-145.. 1989.
CONSTRUCTOR: A Natural Language Interface Based on Attribute Grammars. Acta Cybernetica. 9:247-255.. 1990.
THALES: a software package for plane geometry constructions with a natural language interface. Proceedings of the 13th conference on Computational linguistics - Volume 1. :44–46.. 1990.