@article{Michel2004,
  author    = {{Michel, Pascal}},
  title     = {{Small Turing machines and generalized busy beaver competition}},
  journal   = {{Theor. Comp. Sci.}},
  year      = {{2004}},
  volume    = {{326}},
  pages     = {{45--56}},
  note      = {{MR 2005e:68049, Zbl 1071.68025}},
}