Root82'

@article{DBLP:journals/tit/Root82,
  author    = {William L. Root},
  title     = {Coding for a class of nonprobabilistic channels with nonzero
               memory},
  journal   = {IEEE Transactions on Information Theory},
  volume    = {28},
  number    = {3},
  year      = {1982},
  pages     = {414-421},
  ee        = {http://dx.doi.org/10.1109/TIT.1982.1056512},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}