@inproceedings{ijcai1989p238,
  title     = {Bidirectional Use of Knowledge in the Multi-modal NL Access System XTRA},
  author    = {Allgayer, Jürgen and Jansen-Winkeln, Roman M. and Reddig, Carola and Reithinger, Norbert},
  booktitle = {Proceedings of the Eleventh International Joint Conference on
               Artificial Intelligence, {IJCAI-89}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {N. S. Sridharan},
  pages     = {1492--1496},
  year      = {1989},
  month     = {8},
  note      = {Speech and Natural Language},
  url       = {https://ijcai.org/proceedings/1989/238},
}