1. R.S. Barnes and D.J. Mazey, UKAEA Unclassified Report, AERE R-3348, (1960) and Phil.Mag 5, 290 (1960).
2. B.M.U. Scherzer, p 271 in Topics in Applied Physics, Vol.52—Sputtering by Particle Bombardment II, R. Behrisch, ed., Springer-Verlag, Berlin (1983).
3. S.L. Sass and B.L. Eyre, Phil.Mag 27, 1447 (1973).
4. D.J. Mazey, B.L. Eyre, J.H. Evans, S.K. Erents and G.M. McCracken, J. Nucl. Mater. 64, 145 (1977).
5. J.H. Evans, Radial. Effects 10, 55 (1971) and ibid