1. P. Hohenberg and W. Kohn,Phys. Rev. 136B:864 (1964).
2. W. Kohn and L. J. Sham,Phys. Rev. 140A:1133 (1965).
3. W. Kohn, Density Functional Theory: Basic Results and Some Observations, Lecture presented at the NATO Summer School on Density Functional Methods in Physics, Alcabideche, Portugal, 1983; ITP preprint (1984).
4. S. Lundquist and N. H. March, eds.,Theory of the Inhomogeneous Electron Gas (Plenum Press, New York, 1983).
5. R. Evans.Adv. Phys. 28:143 (1979).