Torsten Fink Manuel Koch Cristian Oancea Specification and Enforcement of Access Control in Heterogeneous Distributed Applications. 88-100 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2853&spage=88 2003 conf/icws/2003e ICWS-Europe db/conf/icws/icwse2003.html#FinkKO03