HagerupCD89'

@article{DBLP:journals/siamcomp/HagerupCD89,
  author    = {Torben Hagerup and
               Marek Chrobak and
               Krzysztof Diks},
  title     = {Optimal Parallel 5-Colouring of Planar Graphs},
  journal   = {SIAM J. Comput.},
  volume    = {18},
  number    = {2},
  year      = {1989},
  pages     = {288-300},
  ee        = {http://dx.doi.org/10.1137/0218020},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}