Carlos A. Velasco Yehya Mohamad Dirk Stegemann Henrike Gappa Gaby Nordbrock Erwin Hartsuiker Javier Sánchez-Lacuesta Juan Manuel Belda IPCA: Adaptive Interfaces Based upon Biofeedback Sensors. 129-134 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3118&spage=129 2004 conf/icchp/2004 ICCHP db/conf/icchp/icchp2004.html#VelascoMSGNHSB04