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"Planar graphs without 5-cycles or without 6-cycles."
Qin Ma, Jian-Liang Wu, Xiao Yu (2009)
- Qin Ma, Jian-Liang Wu, Xiao Yu:
Planar graphs without 5-cycles or without 6-cycles. Discret. Math. 309(10): 2998-3005 (2009)
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