1. For a recent comprehensive treatment of the field of angle-resolved PES see S.D. Kevan (ed.): Angle-Resolved Photoemission, Theory and Current Applications, Studies in Surf. Sci. Catal., Vol.74 (Elsevier, Amsterdam 1992); a discussion of the relation between ground-state and excited-state band structures via PES can be found in R.W. Godby, R.J. Needs: Physics Scripta T 31, 227 (1990)
2. J. Stöhr, P.S. Wehner, R.S. Williams, G. Apai, D.A. Shirley: Phys. Rev. B 17, 587 (1978)
3. P. Thiry, D. Chandesris, J. Le Cante, G. Guillot, P. Pinchaux, Y. Petroff: Phys. Rev. Lett. 43, 82 (1979)
4. Y. Petroff, P. Thiry: Appl. Optics 19, 3957 (1980)
5. P. Thiry: La photoémission angulaire dans les solides. These d’État, Université Paris V I, 1979