@MISC{ClarkJacob97,
  AUTHOR = {John Clark and Jeremy Jacob},
  TITLE = {A Survey of Authentication Protocol Literature},
  MONTH = {November},
  YEAR = 1997,
  URL = {http://www-users.cs.york.ac.uk/~jac/papers/drareview.ps.gz}
}

@ARTICLE{OtwayRees87,
  AUTHOR = {D. Otway and O. Rees},
  TITLE = {Efficient and Timely Mutual Authentication},
  JOURNAL = {Operating Systems Review},
  YEAR = 1987,
  VOLUME = 21,
  NUMBER = 1,
  PAGES = {8--10}
}