A New Role-Based Delegation Model Using Sub-role Hierarchies.

HyungHyo Lee YoungLok Lee BongNam Noh A New Role-Based Delegation Model Using Sub-role Hierarchies. 811-818 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2869&spage=811 2003 conf/iscis/2003 ISCIS db/conf/iscis/iscis2003.html#LeeLN03