Kailash Bhoopalam Kurt Maly Ravi Mukkamala Mohammad Zubair D. Agrawal David Kaminsky A Comparative Study of Specification Models for Autonomic Access Control of Digital Rights. 102-112 2005 conf/drmtics/2005 DRMTICS http://dx.doi.org/10.1007/11787952_8 db/conf/drmtics/drmtics2005.html#BhoopalamMMZAK05