1. The basics of electron spectroscopies are described in textbooks on Surface Physics, e.g. G. Ertl J. Küppers: Low Energy Electrons and Surface Chemistry (VCH Verlagsgesellschaft, Weinheim 1985)
2. J. Kessler: Polarized Electrons (Springer, Berlin, Heidelberg 1985)
3. R. Feder (ed.): Polarized Electrons in Surface Physics, (World Scientific, Singapore 1985)
4. J. Kirschner: “Polarized Electrons at Surfaces” in Springer Tracts in Mod. Physics, Vol. 106 (Springer, Berlin, Heidelberg 1985)
5. C.J. Powell: J. Electron Spectrosc. Relat. Phenom. 47, 197 (1988)