1. D. J. Erlich and J. Y. Tsao, J. Vac. Sci. Technol.
B1 (1985) 969.
2. Y. Rytz-Froidevaux, R. P. Salathe and H. H. Gilgen, Appl. Phys.
A37 (1985) 121.
3. C. J. Chen, J. Vac. Sci. Technol.
A5 (1987) 3386.
4. C. W. White and M. J. Aziz, in “Surface Alloying by Ion, Electron and Laser Beams”, edited by L. E. Rehn, S. T. Picraux and H. Wiedesich (ASM, Ohio, USA, 1986) p. 19.
5. E. Jacobsohn, J. Zahavi, A. Rosen and S. Nadiv, in The 12th International Plansee Seminar, edited by H. Bildstein and H. M. Ortner (Metalwerk Plansee GmBH, Revtte, Austria, 1989) p. 109.