1. Venkatesan T, Calcagno L, Elman B S and Foti G: in Ion Beam Modification of Insulators (ed. P. Mazzoldi and G.W. Arnold, Elsevier, Amsterdam 1987) Ch. 8.
2. Arnold G W and Mazzoldi P: in reference 1, Ch. 5.
3. McHargue G J: in reference 1, Ch. 6.
4. Mazzoldi P: Nucl. Instr. Meth. 209/210 (1983) 1089.
5. Mazzoldi P and Miotello A: Rad. Eff. 98 (1986) 205.