@article{Kohl2008b,
  author    = {{Stefan Kohl}},
  title     = {{Algorithms for a class of infinite permutation groups}},
  journal   = {{J. of Symbolic Computation}},
  year      = {{2008}},
  volume    = {{43}},
  number    = {{8}},
  pages     = {{545--581}},
  note      = {{MR 2009e:20003}},
}