Bienstock91'

BibTeX

@article{DBLP:journals/dcg/Bienstock91,
  author    = {Daniel Bienstock},
  title     = {Some Provably Hard Crossing Number Problems},
  journal   = {Discrete {\&} Computational Geometry},
  volume    = {6},
  year      = {1991},
  pages     = {443-459},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}