@article{WangWangFenXu2003,
  author    = {{Wang, Xing-Yuan; Wang, Qiao Long; Fen, Yue Ping; and Xu, Zhi Wen}},
  title     = {{The distribution of the fixed points on the real axis of a generalized $3x+1$ function and some related fractal images}},
  journal   = {{Journal of Image and Graphics}},
  year      = {{2003}},
  number    = {{1}},
}