1. K. Urban,Proc. 10th ICEM, Vol. 2, Hamburg, 1982, p. 439.
2. L. L. Levenson,Scanning Electron Microsc. 1982,3, 925.
3. E. L. Thomas, in:Developments in Electron Microscopy and Analysis (J. A. Venables ed.), Academic Press, London, 1976, p. 293.
4. L. Reimer,Scanning Electron Microscopy, Springer, Berlin Heidelberg New York Tokyo, 1985, p. 139.
5. L. Reimer, R. B�ngeler, M. K�ssens, F. F. Liebscher, R. Senkel,Scanning 1991,13, 381.