@article{Joseph1998,
  author    = {{John  A. Joseph}},
  title     = {{A chaotic extension of the Collatz function to $\mathbb{Z}_2 [i]$}},
  journal   = {{Fibonacci Quarterly}},
  year      = {{1998}},
  volume    = {{36}},
  pages     = {{309--317}},
  note      = {{MR 99f:11026}},
}