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"Nowhere zero 4-flow in regular matroids."
Hong-Jian Lai, Xiangwen Li, Hoifung Poon (2005)
- Hong-Jian Lai, Xiangwen Li, Hoifung Poon:
Nowhere zero 4-flow in regular matroids. J. Graph Theory 49(3): 196-204 (2005)
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