@article{Hoare66a,
  title = "A Contribution to the Development of {ALGOL}",
  author = "N. Wirth and C.A.R. Hoare",
  year = "1966",
  journal = "Communications of the ACM",
  month = "June",
  number = "6",
  pages = "413--432",
  volume = "9",
}