@inproceedings{ijcai2003p69,
  title     = {LADDER: A Language to Describe Drawing, Display, and Editing in Sketch Recognition},
  author    = {Hammond, Tracy and Davis, Randall},
  booktitle = {Proceedings of the Eighteenth International Joint Conference on
               Artificial Intelligence, {IJCAI-03}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Georg Gottlob},
  pages     = {461--466},
  year      = {2003},
  url       = {https://ijcai.org/proceedings/2003/69},
}