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添加9字节 、 2020年10月13日 (二) 23:32
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{{reflist}}
 
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==Further reading==
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==Further reading 拓展阅读==
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* Jonathan L Gross, Jay Yellen, ''Graph Theory and its applications'', second edition, 2006 (p 97, Incidence Matrices for undirected graphs; p 98, incidence matrices for digraphs)
 
* Jonathan L Gross, Jay Yellen, ''Graph Theory and its applications'', second edition, 2006 (p 97, Incidence Matrices for undirected graphs; p 98, incidence matrices for digraphs)
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==External links==
 
==External links==
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