@article{Cadogan2000,
  author    = {{Charles C. Cadogan}},
  title     = {{The $3x+1$ problem: towards a solution}},
  journal   = {{Caribbean J. Math. Comput. Sci.}},
  year      = {{2000}},
  volume    = {{10}},
  pages     = {{2}},
  note      = {{MR 2005g:11032}},
}