@inproceedings{ijcai1993p64,
  title     = {Constraint Based Automatic Construction and Manipulation of Geometric Figures},
  author    = {Allen, Richard and Idt, Jeanne and Trilling, Laurent},
  booktitle = {Proceedings of the Thirteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-93}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Ruzena Bajcsy},
  pages     = {453--458},
  year      = {1993},
  note      = {Intelligent Tutoring Systems},
  url       = {https://ijcai.org/proceedings/1993/64},
}