Greibach68'

BibTeX

@article{DBLP:journals/mst/Greibach68,
  author    = {Sheila A. Greibach},
  title     = {A Note on Undecidable Properties of Formal Languages},
  journal   = {Mathematical Systems Theory},
  volume    = {2},
  number    = {1},
  year      = {1968},
  pages     = {1-6},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}