Coloring Powers of Planar Graphs. Agnarsson, G. & Halldórsson, M. M. SIAM J. Discrete Math. (SIAMDM), 16(4):651-662, 2003.
Coloring Powers of Planar Graphs [link]Paper  bibtex   
@article{ dblp3044313,
  title = {Coloring Powers of Planar Graphs},
  author = {Geir Agnarsson and Magnús M. Halldórsson},
  author_short = {Agnarsson, G. and Halldórsson, M. M.},
  bibtype = {article},
  type = {article},
  year = {2003},
  key = {dblp3044313},
  id = {dblp3044313},
  biburl = {http://www.dblp.org/rec/bibtex/journals/siamdm/AgnarssonH03},
  url = {http://epubs.siam.org/sam-bin/dbq/article/36795},
  journal = {SIAM J. Discrete Math. (SIAMDM)},
  pages = {651-662},
  number = {4},
  volume = {16},
  text = {SIAM J. Discrete Math. (SIAMDM) 16(4):651-662 (2003)}
}

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