Jari Forstadius Ora Lassila Tapio Seppänen RDF-Based Model for Context-Aware Reasoning in Rich Service Environment. 15-19 2005 conf/percom/2005w PerCom Workshops http://doi.ieeecomputersociety.org/10.1109/PERCOMW.2005.65 db/conf/percom/percomw2005.html#ForstadiusLS05