@InProceedings{wilensky-arens:1980:ACL,
  author    = {Robert Wilensky  and  Yigal Arens},
  title     = {PHRAN - A Knowledge-Based Natural Language Understander},
  booktitle = {Proceedings of the 18th Annual Meeting of the Association for Computational Linguistics},
  month     = {June},
  year      = {1980},
  address   = {Philadelphia, Pennsylvania, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {117--121},
  url       = {http://www.aclweb.org/anthology/P80-1030},
  doi       = {10.3115/981436.981471}
}