@InProceedings{jaeger97RoleBasedAccessControl,
  author =       {Trent Jaeger and Frederique Giraud and Nayeem Islam 
                  and Jochen Liedtke},
  title =        {A Role-based Access Control Model
                  for Protection Domain Derivation and Management},
  booktitle =    {Proceedings of the 
                  2nd ACM Role-based Access Control Workshop},
  address =      {Fairfax, VA},
  month =         nov,
  year =          1997,
  url =          {http://l4ka.org/publications/}
}