NarendranM84'

BibTeX

@article{DBLP:journals/tcs/NarendranM84,
  author    = {Paliath Narendran and
               Robert McNaughton},
  title     = {The Undecidability of the Preperfectness of Thue Systems},
  journal   = {Theor. Comput. Sci.},
  volume    = {31},
  year      = {1984},
  pages     = {165-174},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}