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"The planar Ramsey number PR(K4-e, K5)."
Yongqi Sun et al. (2007)
- Yongqi Sun, Yuansheng Yang, Xiaohui Lin, Qiao Jing:
The planar Ramsey number PR(K4-e, K5). Discret. Math. 307(1): 137-142 (2007)
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