@article{Monks2009,
  author    = {{Monks, Maria}},
  title     = {{Endomorphisms of the shift dynamical systems, discrete derivatives, and applications}},
  journal   = {{Discrete Math.}},
  year      = {{2009}},
  volume    = {{309}},
  pages     = {{5196--5205}},
  note      = {{MR 2010i:37217}},
}