1. G. Binnig, H. Rohrer, Ch. Gerber, E. Weibel: Phys. Rev. Lett. 49, 57 (1982)
2. Proc. Second Int. Conf. on STM, J. Vac. Sci. Technol. A 6 (1988), see also, Proc. Third Int. Conf. on STM, J. Microscopy 152 (1988) and also Proc. Fourth Int. Conf. on STM, J. Vac. Sci. Technol. A 8 (1990)
3. NATO ASI SERIES E: Applied Science,1990
4. For recent review articles see E. Taglauer: In Methods of Surface Characterization, Vol. 2. ed. by A.W. Czanderna, D.M. Hercules (Plenum, New York 1991)
5. H. Niehus: In Practical Surface Analysis by Ion and Neutral Spectroscopy, Vol. 2 (Wiley, Chichester 1991)