@inproceedings{Conway1972,
  author    = {{John H. Conway}},
  title     = {{Unpredicatable Iterations}},
  booktitle = {{Proc. 1972 Number Theory Conference, University of Colorado}},
  year      = {{1972}},
  pages     = {{49--52}},
  url       = {{https://gwern.net/doc/cs/computable/1972-conway.pdf}},
  note      = {{MR 52 #13717}},
}