Cristian Hesselman Andrew Tokmakoff Pravin Pawar Sorin M. Iacob Discovery and Composition of Services for Context-Aware Systems. 67-81 2006 conf/eurossc/2006 EuroSSC http://dx.doi.org/10.1007/11907503_6 db/conf/eurossc/eurossc2006.html#HesselmanTPI06