@inproceedings{ijcai1989p78,
  title     = {The Generation of 'Critical Problems' by Abstract Interpretations of Student Models},
  author    = {Evertsz, Rick},
  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     = {483--487},
  year      = {1989},
  month     = {8},
  note      = {Intelligent Tutoring Systems},
  url       = {https://ijcai.org/proceedings/1989/78},
}