@article{MerliniSala1999,
  author    = {{Danilo Merlini and Nicoletta Sala}},
  title     = {{On the Fibonacci's Attractor and the Long Orbits in the $3n+1$ Problem}},
  journal   = {{International Journal of Chaos Theory and Applications}},
  year      = {{1999}},
  volume    = {{4}},
  number    = {{2-3}},
  pages     = {{75--84}},
}