GareyJ79'

@book{DBLP:books/fm/GareyJ79,
  author    = {M. R. Garey and
               David S. Johnson},
  title     = {Computers and Intractability: A Guide to the Theory of NP-Completeness},
  publisher = {W. H. Freeman},
  year      = {1979},
  isbn      = {0-7167-1044-7},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}