@article{Zhou1995,
  author    = {{Zhou, Chuan Zhong}},
  title     = {{Some discussion on the $3x+1$ problem}},
  journal   = {{J. South China Normal Univ. Natur. Sci. Ed. 
[ Hua nan shi fan da xue xue bao. Zi ran ke xue ban]}},
  year      = {{1995}},
  pages     = {{103--105}},
  note      = {{MR 97h:11021}},
}