1. Beju, I., Soós, E., Teodorescu, P.P.: Euclidiean Tensor Calculus with Applications. Ed. Tehnică, Bucureşti, Abacus Press, Tunbridge Wells, Kent (1983)
2. Brekhovskikh, L.M.: Waves Layered Media. Appl. Math. Mech. 6, Academic Press, New York (1960)
3. Cagniard, L.: Reflexion et refraction des ondes seismiques progressives. Gauthier-Villars, Paris (1935)
4. Davies, R.M.: Stress Waves in Solids. Surv. Mech. Cambridge University Press, Cambridge (1956)
5. Ewing, W.M., Jardetzky, W.S., Press, F.: Elastic Waves in Layered Media. McGraw-Hill Book Co., Inc., New York (1957)