Nima Kaviani Dragan Gasevic Milan Milanovic Marek Hatala Bardia Mohabbati Model-Driven Engineering of a General Policy Modeling Language. 101-104 2008 POLICY http://doi.ieeecomputersociety.org/10.1109/POLICY.2008.29 conf/policy/2008 db/conf/policy/policy2008.html#KavianiGMHM08