1. [1] J. D. Achenbach, Wave Propagation in Elastic Solids, North-Holland, New York, 1973.
2. [2] P. G. Ciarlet, Mathematical elasticity. Vol. I, Studies in Mathematics and its Applications, vol. 20, North-Holland Publishing Co., Amsterdam, 1988.
3. [3] G. Fichera, Existence theorems in elasticity, Mechanics of Solids II eds. S. Flügge and C. Truesdell, vol. 6a, Springer-Verlag, Berlin, 1965, Handbuch Physik, pp. 347–389.
4. [4] J.-C. Guillot, Existence and uniqueness of a Rayleigh surface wave propagating along the free boundary of a transversely isotropic elastic half space, Math. Methods Appl. Sci. 8 (1986), no. 2, 289–310.
5. [5] L. Hörmander, The analysis of linear partial differential operators. III, Grundlehren der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], vol. 274, Springer-Verlag, Berlin, 1985.