@article{ApplegateLagarias1995c,
  author    = {{David Applegate and Jeffrey C. Lagarias}},
  title     = {{On the distribution of $3x+1$ trees}},
  journal   = {{Experimental Mathematics}},
  year      = {{1995}},
  volume    = {{4}},
  pages     = {{101--117}},
  note      = {{MR 97e:11033}},
}