Head90'

BibTeX

@article{DBLP:journals/tcs/Head90,
  author    = {Tom Head},
  title     = {The Set of Strings Mapped Into a Submonoid by Iterates of
               a Morphism},
  journal   = {Theor. Comput. Sci.},
  volume    = {73},
  number    = {3},
  year      = {1990},
  pages     = {329-333},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}