1. Adushkin, V.V., Gamburtseva, N.G., Sanina, I.A., et al., Results of long-term sounding of the lithosphere with seismic waves from strong explosions and earthquakes, Dokl., Earth Sci., 2008, vol. 418, no. 1, pp. 81–86.
2. Allegri, L., Bella, F., Della Monica, G., et al., Radon and tilt anomalies detected before the Irpina (south Italy) earthquake of November 23, 1980, at great distances from the epicenter, Geophys. Res. Lett., 1983, no. 10, pp. 269–272.
3. Borell, B., Deep structure images under Hawaii, Nature, December 3, 2009. doi 10.1038/news.2009.1121
4. Bredehoeft, J.D., Response of well-aquifer systems to Earth tides, J. Geophys. Res., 1967, vol. 72, pp. 3075–3087.
5. Caray, S.W., The Expanding Earth, Amsterdam: Elsevier, 1976.