1. S. S. Grigoryan, Prikl. Mat. Mekh. 24, 1057 (1960).
2. G. M. Lyakhov, Waves in Soils and Porous Multicomponent Media (Nauka, Moscow, 1982) [in Russian].
3. Kh. A. Rakhmatulin, A. Ya. Sagomonyan, and N. A. Alekseev, Soil Dynamics (Izd. MGU, Moscow, 1964) [in Russian].
4. A. A. Vovk, B. V. Zamyshlyaev, L. S. Evterev, et al., Soil Behavior under Pulsed Load (Naukova Dumka, Kiev, 1984) [in Russian].
5. A. Gasagrande and W. Z. Schanon, Proc. Am. Soc. Civ. Eng. 74(4), 29 (1948).