SpirakisY84'

BibTeX

@article{DBLP:journals/ipl/SpirakisY84,
  author    = {Paul G. Spirakis and
               Chee-Keng Yap},
  title     = {Strong NP-Hardness of Moving Many Discs},
  journal   = {Inf. Process. Lett.},
  volume    = {19},
  number    = {1},
  year      = {1984},
  pages     = {55-59},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}