References

1. Ziegler, T., A. Rauk, and E.J. Baerends, On the calculation of Multiplet Energies by the Hartree Fock Slater method. Theoretica Chimica Acta, 1977, 43: p. 261-271

2. Daul, C., DFT applied to excited states. International Journal of Quantum Chemistry, 1994, 52: p. 867-877

3. Baerends, E.J., V. Branchadell, and M. Sodupe, Atomic reference energies for density functional calculations. Chemical Physics Letters, 1997, 265: p. 481