@misc{12221,
  author = {David Ferraiolo and Larry Feldman and Gregory Witte},
  title = {Policy Machine: Towards a General Purpose Enterprise-Wide Operating Environment},
  year = {2014},
  month = {2014-08-28},
  publisher = {ITL Bulletin, National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916386},
  language = {en},
}