@InProceedings{Alvarado2001Preserving,
  author =	 {Christine Alvarado and Randall Davis},
  title =	 {Preserving the Freedom of Sketching to Create a
                  Natural Computer-Based Sketch Tool},
  booktitle =	 {Human Computer Interaction International
                  Proceedings},
  year =	 {2001},
  OPTkeywords =	 {Domain Sketch Systems}
}