1. V. D. Kupradze, Potential Methods in the Theory of Elasticity (Fizmatgiz Moscow, 1963; Israel Program of Scientific Translations, Jerusalem, 1993).
2. G. M. Goluzin, Geometric Theory of Functions of a Complex Variable (Am. Math. Soc., Providence, R.I., 1969; Nauka Moscow, 1972).
3. N. I. Muskhelishvili, Some Basic Problems in the Mathematical Theory of Elasticity (Nauka Moscow, 1966) [in Russian].
4. G. Fichera, Existence Theorems in Elasticity (SpringerVerlag, Berlin, 1972; Mir Moscow, 1974).
5. S. G. Lekhnitskii, Theory of Elasticity of an Anisotropic Elastic Body (Moscow, 1950; Holden-Day San Francisco, 1963).