@InProceedings {Oltmans2001Naturally,
  author =	 {Michael Oltmans and Randall Davis},
  title =	 {Naturally Conveyed Explanations of Device Behavior},
  booktitle =	 {Workshop on Perceptive User Interfaces},
  year =	 {2001},
  OPTkeyword =	 {Domain Sketch System},
}