@article{Anderson1987,
  author    = {{S. Anderson}},
  title     = {{Struggling with the $3x  +  1$ problem}},
  journal   = {{Math. Gazette}},
  year      = {{1987}},
  volume    = {{71}},
  pages     = {{271--274}},
  url       = {{https://www.cambridge.org/core/journals/mathematical-gazette/article/abs/struggling-with-the-3x-1-problem/E144C33BAB6099FFCC05B79E0FF2E559}},
}