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3. R. C. Pfahl and J. Mitchel, AIAA J.,8, No. 6 (1969).
4. A. V. Lykov, Theory of Heat Conduction [in Russian], Vysshaya Shkola, Moscow (1967).
5. H. S. Carslaw and J. C. Jaeger, Conduction of Heat in Solids, Clarendon Press, Oxford (1959).