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"A six-color theorem for the edge-face coloring of plane graphs."
Cuiqin Lin, Guanzhang Hu, Zhongfu Zhang (1995)
- Cuiqin Lin, Guanzhang Hu, Zhongfu Zhang:
A six-color theorem for the edge-face coloring of plane graphs. Discret. Math. 141(1-3): 291-297 (1995)
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