1. N. I. Bezukhov, Foundations of the Theory of Elasticity, Plasticity, and Creeping [in Russian], Vysshaya Shkola, Moscow (1968).
2. S. P. Demidov, Theory of Elasticity [in Russian], Vysshaya Shkola, Moscow (1979).
3. L. S. Leibenzon, A Course in the Theory of Elasticity [in Russian], Gostekhizdat, Moscow (1947).
4. V. V. Stepanov, A Course in Ordinary Differential Equations [in Russian], Gostekhizdat, Moscow (1938).