Effective electron–electron and electron–phonon interactions in the Hubbard–Holstein model - Aprea, G.; Di Castro, C.; Grilli, M.; Lorenzana, J. (Nuclear physics. B, 2006)
Keywords: Electron–electron interaction; Electron–phonon interaction; Flow equations; 71.10.Fd; Flow equations; 71.10.-w; 63.20.Kr; Electron–phonon interaction; Electron–electron interaction