1. J. D. Achenbach, Wave Propagation in Elastic Solids (North Holland Publishing Comp., New York, 1973).
2. M. Bath, Mathematical Aspects of Seismology (Elsevier Publishing Comp., New York, 1968).
3. W. M. Ewing, W. S. Jardetzky, and F. Press, Elastic Waves in layered Media (McGraw Hill, New York, 1957).
4. A. E. H. Love, Mathematical Theory of Elasticity (Cambridge, Cambridge University Press, 1920).
5. M. A. Biot, Mechanics of Incremental Deformation (John Willey & Sons, New York, 1965).