Alessandra Toninelli Rebecca Montanari Lalana Kagal Ora Lassila Proteus: A Semantic Context-Aware Adaptive Policy Model. 129-140 2007 conf/policy/2007 POLICY http://doi.ieeecomputersociety.org/10.1109/POLICY.2007.40 db/conf/policy/policy2007.html#ToninelliMKL07