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G. Fan.
Subgraph coverings and edge switchings.
Journal of Combinatorial Theory, 84(1):54-83, January 2002.
Series B. BibTeX entry, PDF, Abstract |
| [2] |
Christophe Texier.
Scattering theory on graphs: Ii. the friedel sum rule.
Journal of Physics A: Mathematical and General,
35(15):3389-3407, 2002. BibTeX entry, PDF, Abstract |