@inproceedings{ClarkLewis1998,
  author    = {{Dean Clark and James T. Lewis}},
  title     = {{Symmetric solutions to a Collatz-like system of  Difference Equations}},
  booktitle = {{Proc. Twenty-ninth Internationsal Conference on Combinatorics, Graph Theory and Computing (Baton Rouge 1998)}},
  year      = {{1998}},
  volume    = {{131}},
  pages     = {{101--114}},
  note      = {{see MR 99i:00021}},
}