1. I. N. Sneddon and D. S. Berry, The Classical Theory of Elasticity (Springer, Berlin–Heidelberg, 1958).
2. N. E. Kochin, Vector Calculus and Fundamentals of Tensor Calculus (Izd. Akad. Nauk SSSR, Moscow, 1951) [in Russian].
3. L. I. Sedov, A Course in Continuum Mechanics (Fizmatgiz, Moscow, 1962; Wolters-Noordhoff, Groningen, Netherlands, 1972).
4. N. G. Petrovsky, Lectures on Partial Differential Equations (Fizmatgiz, Moscow, 1961; Interscience Publ., New York, 1954).
5. G. A. Korn and T. M. Korn, Mathematical Handbook for Scientists and Engineers: Definitions, Theorems, and Formulas for Reference and Review (McGraw-Hill, New York, 1961).