References

1

Ashcroft, N. W., Mermin, N. D., Solid State Physics, Saunders (1976) Philadelphia

2

Sommerfeld, A., Bethe, H., Elektronentheorie der Metalle, Springer (1967) Heidelberg

3

Gruber, M. J., X-Ray Diffraction and Skriganov's Proof of the Bethe-Sommerfeld Conjecture, Workshop on Spectral Properties of Gauge-Invariant Differential Operators and Applications in Solid State Physics (March 1995) Oberwolfach

4

Ziman, J. M., Theory of Solids, Cambridge University Press (1972)