@inproceedings{ijcai1993p63,
  title     = {Classification Networks: A Knowledge Representation Scheme for Curriculum Prescription},
  author    = {Yum, Kwok-Keung and Richards, Thomas J.},
  booktitle = {Proceedings of the Thirteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-93}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ruzena Bajcsy},
  pages     = {447--451},
  year      = {1993},
  note      = {Intelligent Tutoring Systems},
  url       = {https://ijcai.org/proceedings/1993/63},
}