1. Normal Fermi Liquids;D Pines,1966
2. W. Kohn and L. J. Sham, Self-consistent equations including exchange and correlation effects Phys. Rev. 140:A1133 (1965).
3. J. Hubbard, Electron correlations in narrow energy bands III. An improved solution, Proc. Roy. Soc. A. 281:401 (1964).
4. D. J. Scalapino, Does the Hubbard model have the right stuff?, in: Perspectives in Many Particle Physics R. A. Broglia and J. R. Schrieffer, eds., North-Holland, Amsterdam (1994), p. 95.
5. A. vom Felde, J. Sprösser-Prou, and J. Fink, Valence-electron excitations in the alkali metals, Phys. Rev. B 40:10181 (1989).