1. Elastic Waves in Layered Media;Ewing,1957
2. Waves in Layered Media;Brekhovskikh,1976
3. An Introduction to the Theory of Seismology;Bullen,1985
4. Waves and Fields in Inhomogeneous Media;Chew,1990
5. Wave propagation in layered media by time domain BEM;Cheung;Earthq. Eng. Struct. Dyn.,1993