Saad Liaquat Kiani Maria Riaz Yonil Zhung Sungyoung Lee Young-Koo Lee A Distributed Middleware Solution for Context Awareness in Ubiquitous Systems. 451-454 2005 conf/rtcsa/2005 RTCSA http://doi.ieeecomputersociety.org/10.1109/RTCSA.2005.9 db/conf/rtcsa/rtcsa2005.html#KianiRZLL05