@article{SimonsWeger2004,
  author    = {{John L. Simons and Benne M. M. de Weger}},
  title     = {{Mersenne en het Syracuseprobleem [Mersenne and the Syracuse problem]}},
  journal   = {{Nieuw Arch. Wiskd.}},
  year      = {{2004}},
  volume    = {{5}},
  number    = {{3}},
  pages     = {{218--220}},
  note      = {{MR2090398}},
}