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2. The Mathematics of Diffusion;Crank,1986
3. Random Walks in Biology;Berg,1983
4. Cussler, E.L. (1997). Diffusion: Mass Transfer in Fluid Systems. 2nd edn. Cambridge University Press, Cambridge.
5. Carslaw, H.S. & Jaeger, J.C. (1959). Conduction of Heat in Solids, 2nd edn. Oxford University Press, Oxford.