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2. B. I. Boltaks, ?Diffusion in Semiconductors? (Infosearch, London, 1963).
3. R. M. Burger and R. P. Donovan, ?Fundamentals of Silicon Integrated Device Technology? Vol. 1 (Prentice Hall, New Jersey, 1967).
4. R. L. Longini and R. F. Greene, Phys. Rev. 102 (1956) 992.
5. M. W. Valenta and C. Ramasastry, ibid 106 (1957) 73.