Christopher Richard Wren Flavia Sparacino Ali Azarbayejani Trevor Darrell Thad Starner Akira Kotani Chloe M. Chao Michal Hlavac Kenneth B. Russell Alex Pentland Perceptive Spaces for Performance and Entertainment Untethered Interaction Using Computer Vision and Audition. 267-284 1997 11 Applied Artificial Intelligence 4 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0883-9514&volume=11&issue=4&spage=267 db/journals/aai/aai11.html#WrenSADSKCHRP97