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Document type:
Konferenzbeitrag 
Author(s):
Pretschner, A.; Schütz, F.; Schaefer, C.; Walter, T. 
Title:
Policy Evolution in Distributed Usage Control 
Pages contribution:
109-123 
Book / Congress title:
4th Intl. Workshop on Security and Trust Management (STM'08) 
Publisher:
Elsevier BV 
Date of publication:
01.08.2009 
Year:
2009