1. N. E. Christensen and B. O. Seraphin, Phys. Rev. B 4, 3321 (1971).
2. P. Pyykkö, Adv. Quantum. Chem. 11, 353 (1978).
3. Y. Cauchois and I. Manescu, C. R. Acad. Sci. 210, 172 (1940).
4. N. F. Mott, Proc. Phys. Soc. A 62, 416 (1949).
5. A. R. Mackintosh and O. K. Andersen, in Electrons at the Fermi Surface, edited by M. Springford (Cambridge University Press, Cambridge, 1980), Chap. The Electronic Structure of Transition Metals.