1. M. A. Biot, J. Appl. Mech.,A41, 37 (1935).
2. N. I. Muskhelishvili, Some Fundamental Problems of the Mathematical Theory of Elasticity [in Russian], Nauka (1966).
3. M. A. Koltunov and A. S. Nikolaevskii, Mekhan. Polim., No. 5, 678 (1966).
4. G. Lianis, ARS J.,32, No. 5 (1962).