1. R.G. Parr, W. Yang, Density-Functional Theory of Atoms and Molecules, Oxford University Press, Oxford, 1989.
2. E.S. Kryachko, E.V. Ludeña, Energy Density Functional Theory of Many Electron Systems, Kluwer Academic Publishers, Dordrecht, 1990.
3. F. Moscardó, E. San Fabián, in: S. Fraga (Ed.), Computational Chemistry: Structure, Interaction and Reactivity, part A, Elsevier, Amsterdam, 1992, p. 166.
4. E.K.U. Gross, M. Petersilka, T. Grabo, in: Density Functional Methods in Chemistry, American Chemical Society Series, vol. 629, American Chemical Society, WA, 1996.
5. An approximate local-density expression for the correlation energy of atoms