Recurrence relations for spin foam vertices

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2006

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E.R. Livine and S. Speziale, A new spinfoam vertex for quantum gravity

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S. Speziale, Towards the graviton from spinfoams: the 3d toy model

2007

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E. Alesci and C. Rovelli, “The complete LQG propagator: I. Difficulties with the Barrett-Crane vertex,” Phys. Rev. D 76

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2007

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E. Alesci, K. Noui and F. Sardelli, “Spin-Foam Models and the Physical Scalar Product,” Phys. Rev. D 78