@inproceedings{ijcai1985p159,
  title     = {Tense, Aspect, and Cognitive Representation of Time},
  author    = {Yip, Kenneth Man-kam},
  booktitle = {Proceedings of the Ninth International Joint Conference on
               Artificial Intelligence, {IJCAI-85}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Aravind Joshi},
  pages     = {806--813},
  year      = {1985},
  note      = {Natural Language},
  url       = {https://ijcai.org/proceedings/1985/159},
}