1. P. Duwez, Trans. ASM 60 (1967) 607
2. D. Turnbull, Contemp. Phys. 10 (1969) 473
3. K.L. Chopra, Thin Film Phenomena, New York 1969
4. L. Holland, Vacuum Deposition of Thin Films, London 1970
5. H. Ehrenreich, D. Turnbull, Comments on Solid State Physics B III/3 (1970) 75