@article{Sinai2003a,
  author    = {{Yakov G. Sinai}},
  title     = {{Statistical $(3X+1)$-Problem}},
  journal   = {{Comm. Pure Appl. Math.}},
  year      = {{2003}},
  volume    = {{56}},
  number    = {{7}},
  pages     = {{1016--1028}},
  note      = {{MR 2004d:37007}},
}