Emil Lupu Naranker Dulay Joe Sventek Morris Sloman Autonomous Pervasive Systems and the Policy Challenges of a Small World! 3-7 2007 conf/policy/2007 POLICY http://doi.ieeecomputersociety.org/10.1109/POLICY.2007.9 db/conf/policy/policy2007.html#LupuDSS07