1. Abramovici F. & Alterman Z. 1965 Computations pertaining to the problem of propagation of a seismic pulse in a layered solid. Meth. Comp. Phys. 4 349{379.
2. Achenbach J. D. 1973 Wave propagation in elastic solids. Amsterdam: North-Holland.
3. Alterman Z. & Karal Jr F. C. 1968 Propagation of elastic waves in layered media by -nite di erence methods. Bull. Seism. Soc. Am. 58 367{398.
4. Acoustic emission: some applications of Lamb’s problem
5. Cagniard L. 1939 Re exion et refraction des ondes seismiques progressives. Paris: Gauthiers-Villars. (Transl. Flinn E. A. & Dix C. H. 1962 Re° ection and refraction of progressive seismic waves. McGraw-Hill.)