@Article{	  pretschner.ea:distributed:2006,
  author	= {Alexander Pretschner and Manuel Hilty and David Basin},
  copyright	= {(c) ACM, 2006. This is the author's version of the work.
		  It is posted here by permission of ACM for your personal
		  use. Not for redistribution. The definitive version was
		  published in Communications of the ACM 49(9):39-44,
		  September 2006},
  journal	= {Communications of the ACM},
  language	= {USenglish},
  month		= {September},
  number	= 9,
  pages		= {39--44},
  title		= {Distributed Usage Control},
  volume	= 49,
  year		= 2006,
  user		= {pretscha}
}