@article{GarciaTal1999,
  author    = {{Manuel V. P. Garcia and Fabio A. Tal}},
  title     = {{A note on the generalized $3n + 1$ problem}},
  journal   = {{Acta Arith.}},
  year      = {{1999}},
  volume    = {{90}},
  number    = {{3}},
  pages     = {{245--250}},
  note      = {{MR 2000i:11019}},
}