@article{MargensternMatiyasevich1999,
  author    = {{Maurice Margenstern and Yuri Matiyasevich}},
  title     = {{A binomial representation of the $3X +1$ problem}},
  journal   = {{Acta Arithmetica}},
  year      = {{1999}},
  volume    = {{91}},
  number    = {{4}},
  pages     = {{367--378}},
  note      = {{MR 2001g:11015}},
}