Marcus Nilsson Mikael Drugge Urban Liljedahl Kåre Synnes Peter Parnes A Study on Users' Preference on Interruption When Using Wearable Computers and Head Mounted Displays. 149-158 2005 conf/percom/2005 PerCom http://doi.ieeecomputersociety.org/10.1109/PERCOM.2005.5 db/conf/percom/percom2005.html#NilssonDLSP05