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zbMATH Open1240.05139MaRDI QIDQ3169704

Yanpei Liu, Rongxia Hao

Publication date: 29 September 2011

Title of this publication is not available (Why is that?)

zbMATH Keywords

tree projective plane signed graphs

Mathematics Subject Classification ID

Planar graphs; geometric and topological aspects of graph theory (05C10) Signed and weighted graphs (05C22)

Related Items (1)

The projective-planar signed graphs

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