Gopal Pingali Claudio S. Pinhanez Anthony Levas Rick Kjeldsen Mark Podlaseck Han Chen Piyawadee Noi Sukaviriya Steerable Interfaces for Pervasive Computing Spaces. 315-322 2003 conf/percom/2003 PerCom http://computer.org/proceedings/percom/1893/18930315abs.htm db/conf/percom/percom2003.html#PingaliPLKPCS03