@InProceedings{villadsen:1992:ACL,
  author    = {Jorgen Villadsen},
  title     = {INFORMATION STATES AS FIRST CLASS CITIZENS},
  booktitle = {Proceedings of the 30th Annual Meeting of the Association for Computational Linguistics},
  month     = {June},
  year      = {1992},
  address   = {Newark, Delaware, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {303--305},
  url       = {http://www.aclweb.org/anthology/P92-1045},
  doi       = {10.3115/981967.982013}
}