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2. W. Seith, Diffusion in Metallen, Springer Verlag, Berlin (1955).
3. W. Jost, Diffusion in Solids, Liquids and Gases, Academic Press, New York (1960).
4. P. G. Shewmon, Diffusion in Solids, McGraw-Hill, New York (1963).
5. J. Crank, Mathematics of Diffusion, Oxford Univ. Press, London (1956).