Freuder80'

BibTeX

@article{DBLP:journals/ai/Freuder80,
  author    = {Eugene C. Freuder},
  title     = {On the Knowledge Required to Label a Picture Graph},
  journal   = {Artif. Intell.},
  volume    = {15},
  number    = {1-2},
  year      = {1980},
  pages     = {1-17},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}