1. G. Margaritondo and P. Perfetti, in: Heterojunctions: Band Discontinuities and Device Applications, Eds. F. Capasso and G. Margaritondo (North-Holland, Amsterdam, in press), and references therein.
2. Angle‐resolved photoemission measurements of band discontinuities in the GaAs‐Ge heterojunction
3. For a recent review on surface sensitive techniques see: G. Margaritondo and J.E. Rowe, Electron Spectroscopy, in: Treatise of Analytical Chemistry, Eds. I.M. Kolthoff and P.J. Elving (Wiley, New York, in press);
4. Photoemission Spectroscopy of Valence States;Margaritondo,1985