@article{MatthewsWatts1985,
  author    = {{Keith R. Matthews and Anthony M. Watts}},
  title     = {{A Markov approach to the generalized Syracuse algorithm}},
  journal   = {{Acta Arithmetica}},
  year      = {{1985}},
  volume    = {{45}},
  pages     = {{29--42}},
  note      = {{MR 87c:11071}},
}