@InCollection{Hammond2004DebuggingAbstract,
  author =       {Tracy Hammond and Randall Davis},
  title =        {Debugging Shape Definitions for Use in Sketch Recognition},
  booktitle =    {MIT Computer Science and Artificial Intelligence Laboratory Annual Research Abstract},
  publisher =    {MIT CSAIL},
  year =         2004,
  keywords =     {multimodal},
  address =	 {Cambridge, Massachusetts},
  month =	 {September},
  pages =	{71-77},
}