1. I. S. Zheludev, Physics of Crystalline Dielectrics [in Russian], Nauka, Moscow (1968).
2. Yu. A. Krutkov, Tensor of Stress Functions and General Solutions in the Statics of Elasticity Theory [in Russian], Izd. AN SSSR, Moscow (1949).
3. S. G. Lekhnitskii, Theory of Elasticity of an Anisotropic Body [in Russian], Gostekhizdat, Moscow (1950).
4. A. I. Lur'e, Spatial Problems of Elasticity Theory [in Russian], Gostekhizdat, Moscow (1955).
5. I. E. Tamm, Principles of the Theory of Electricity [in Russian], Fizmatgiz, Moscow (1965).