@article{MonksYazinski2004,
  author    = {{Monks, Kenneth G. and Yazinski, Jonathan}},
  title     = {{The Autoconjugacy of the $3x+1$ function}},
  journal   = {{Discrete Mathematics}},
  year      = {{2004}},
  volume    = {{275}},
  number    = {{1}},
  pages     = {{219--236}},
  note      = {{MR2026287 (2004m:11030)}},
}