@article{Barkley:83,
      author        = "John Barkley and Konstantin Beznosov and Jinny Uppal and
                       John Barkley and Konstantin Beznosov and Jinny Uppal",
      title         = "{Supporting Relationships in Access Control Using Role
                       Based Access Control}",
      month         = "Oct",
      year          = "2005",
}