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"Every Plane Graph with Girth at least 4 without 8- and 9-circuits is ..."
Haihui Zhang, Baogang Xu, Zhiren Sun (2006)
- Haihui Zhang, Baogang Xu, Zhiren Sun:
Every Plane Graph with Girth at least 4 without 8- and 9-circuits is 3-Choosable. Ars Comb. 80 (2006)
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