Martin Strohbach Martin Bauer Ernö Kovacs Claudia Villalonga Nils Richter Context sessions: a novel approach for scalable context management in NGN networks. 5 2007 MNCNA http://doi.acm.org/10.1145/1376878.1376883 conf/middleware/2007mncna db/conf/middleware/mncna2007.html#StrohbachBKVR07