@article{Ke2005,
  author    = {{Ke, Yong-Sheng}},
  title     = {{The proof of the hypothesis about $"3x+1"$}},
  journal   = {{Journal of Tianjin Vocational Institute [Teacher's College] [Tianjin zhi ye ji shu shi fax xue yuan xue bao]}},
  year      = {{2005}},
}