Kreowski78'

@inproceedings{DBLP:conf/gg/Kreowski78,
  author    = {Hans-J{\"o}rg Kreowski},
  title     = {A Pumping Lemma for Context-Free Graph Languages},
  booktitle = {Graph-Grammars and Their Application to Computer Science
               and Biology},
  year      = {1978},
  pages     = {270-283},
  ee        = {http://dx.doi.org/10.1007/BFb0025726},
  crossref  = {DBLP:conf/gg/1978},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/gg/1978,
  editor    = {Volker Claus and
               Hartmut Ehrig and
               Grzegorz Rozenberg},
  title     = {Graph-Grammars and Their Application to Computer Science
               and Biology, International Workshop, Bad Honnef, October
               30 - November 3, 1978},
  booktitle = {Graph-Grammars and Their Application to Computer Science
               and Biology},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {73},
  year      = {1979},
  isbn      = {3-540-09525-X},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}