1. RT Tung, JC Bean, JM Gibson, JM Poate and DC Jacobsen, Appl. Phys. Letters 40 (1982) 684
2. F Arnaud D’Avitaya, S Delage, E Rosencher and S Derrien, J. Vacuum Sei. Technol. B3 (1985) 770
3. BD Hunt, N Lewis, EL Hall, LG Turner, LJ Schowalter, M Okamoto and S Haskimoto, Mater. Res. Symp. Proc. S6 (1986) 151
4. S Saitoh,H Ishiwasa and S Furukawa, Appl. Phys. Lett. 37, (1980) 203
5. YC Kao, M Tejwani, YH Xie, TL Lin and KL Wang, J Vac. Sci. Techno1. B3 (1985) 596