@TechReport{reeder+09:semantics-tr,
  author =       {Robert W. Reeder and Lujo Bauer and Lorrie Faith Cranor and Michael K. Reiter and Kami Vaniea},
  title =        {Effects of access-control policy conflict-resolution methods on policy-authoring usability},
  institution =  {CyLab, Carnegie Mellon University},
  year =         2009,
  month =        mar,
  number =       {CMU-CyLab-09-006},
  url =          {http://www.ece.cmu.edu/~lbauer/papers/2009/cylabtr09-semantics.pdf},
}