1. Atef, A.H., Liu, K.H., and Gao, S.S., Apparent Weekly and Daily Earthquake Periodicities in the Western United States, Bull. Seismol. Soc. Amer., 2009, vol. 99, pp. 2273–2279.
2. Belyakov, A.S., Lavrov, V.S., Nikolaev, A.V., and Khudzinskii, L.L., Underground Acoustic Noise and Its Relation to Tidal Deformations, Izv. Phys. Earth, 1999, vol. 35, pp. 1002–1009.
3. Belyakov, A.S., Zhuravlev, V.I., and Lukk, A.A., Diurnal Periodicity of Weak Earthquakes and High-Frequency Underground Noise in Kamchatka, Izv. Phys. Earth, 2011, vol. 47, pp. 186–206.
4. Davies, D., Nocturnal Earthquakes, Geophys. Journ. Roy. Astr. Soc, 1972, vol. 28, p. 305.
5. Davison, C., Studies on the Periodicity of Earthquakes, London: Murby, 1938.