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2. E. Yanke, F. Emde, and F. Lesh, Special Functions [Russian translation], Nauka, Moscow (1979).
3. A. R. Rzhanitsyn, Theory of Creep [in Russian], Stroiizdat, Moscow (1968).
4. M. A. Koltunov, Creep and Relaxation [in Russian], Vysshaya Shkola, Moscow (1976).
5. A. A. Il'yushin and B. E. Pobedrya, Fundamentals of the Mathematical Theory of Thermoviscoelasticity [in Russian], Nauka, Moscow (1970).