The theory of nonequilibrium Anderson impurity model for strongly correlated electron systems von Moskalenko, V.A., Dohotaru, L.A., Digor, D.F.

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Stationary property of the thermodynamic potential of the Hubbard model in strong coupling diagrammatic approach for superconducting state von Moskalenko, V.A., Dohotaru, L.A., Digor, D.F., Cebotari, I.D.

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