@article{Hammond2004Automatically,
  author =   {Tracy Hammond and Randall Davis},
  title =    {Automatically Transforming Symbolic Shape
                  Descriptions for Use in Sketch Recognition},
  year =     {2004},
  journal =  {Proceedings of the Nineteenth National Conference on
                  Artificial Intelligence (AAAI-04)},
  address =  {San Jose, CA},
  OPTkeywords =  {General Sketch Recognition, Language}
}