1. Lundqvist, B. I.: Phys. kondens. Materie6, 193 (1967).
2. ——: Phys. kondens. Materie6, 206 (1967).
3. ——: Phys. kondens. Materie7, 117 (1968).
4. Hedin, L.: In: Soft X-ray band spectra and the electronic structure of metals and materials. Ed.: D. Fabian. New York: Academic Press (1968).
5. Cuthill, J. R., R. C. Dobbyn, A. J. McAlister, andM. L. Williams: Phys. Rev.174, 515 (1968).