Strässler

Nonadiabatic superconductivity. I. Vertex corrections for the electron-phonon interactions.

Pietronero, L. Pietronero, C. Grimaldi, 1995, Physical review. B, Condensed matter.

Nonadiabatic superconductivity. II. Generalized Eliashberg equations beyond Migdal's theorem.

Pietronero, Grimaldi, Strässler, 1995, Physical review. B, Condensed matter.

Nonadiabatic superconductivity: Electron-phonon interaction beyond Migdal's theorem.

Pietronero, Grimaldi, Strässler, 1995, Physical review letters.