@article{WangYu2007,
  author    = {{Xing-yuan Wang  and  Xue-jing Yu}},
  title     = {{Visualizing generalized $3x+1$ function dynamics based on fractal}},
  journal   = {{Applied  Mathematics and Computation}},
  year      = {{2007}},
  volume    = {{188}},
  number    = {{1}},
  pages     = {{234--243}},
  note      = {{MR2327110}},
}