1. V. D. Kupradze, “Boundary problems of the theory of steady elastic vibrations,” Uspekhi Mat. Nauk 8 (3), 21–74 (1953).
2. V. D. Kupradze, Dynamical Problems in Elasticity (North-Holland Publ. Comp., Amsterdam, 1963).
3. T. Burchuladze, “Non-stationary problems of generalized elastothermodiffusion for inhomogeneous media,” Georgian Math. 1, 587–598 (1994).
4. D. Colton and R. Kress, Inverse Acoustic and Electromagnetic Scattering Theory (Springer, New York, 1998).
5. W. McLean, Strongly Elliptic Systems and Boundary Integral Operators (Cambridge Univ. Press, Cambridge, 2000).