1. Nye, J.F.: Physical Properties of Crystals, Their Representation by Tensors and Matrices. Oxford 1970.
2. Dixon, R.W.: J. Appl. Phys. 38 (1967) 5149.
3. Chistyi, I.L., Kitaeva, V.F., Osiko, V.V., Sobolev, N.N., Starikov, B.P., Timoshechkin, M.I.: Soviet Phys.-Solid State (English Transl.) 17 (1975) 922.
4. Dutoit, M., Walling, J.C., Bondreause, D.S.: Phys. Rev. B11 (1975) 3491.
5. Spencer, E.G., Denton, R.T., Bateman, T.B., Snow, W.B., Van Uitert, L.G.: J. Appl. Phys. 34 (1963) 3059.