1. Kalinnikov, I.I., Matyunin, V.P., Nyunina, N.A., and Getmanskaya, V.V., Early Prediction of Earthquakes in the Teleseismic Zone: Reality, Dokl. Acad. Nauk, 1992, vol. 323, no. 6, pp. 1068–1071.
2. Vol’fson, G.B., About the Possibility of Using a Present-Day Gravitational Variometer for Prediction of Earthquakes, Giroskop. Nav., 2001, no. 4, pp. 33–45.
3. Vol’fson, G.B. and Evstifeev, M.I., Special Features of Dynamics of Precision Devices with Anisotropy of Inertia Properties of a Suspended Body with Rotational Degrees of Freedom, Trudy IX Mezhdunarod. Chetaevskoi Konf. “Analiticheskaya Mekhanika, Ustoichvost’ i Upravlenie Dvizheniem”, Irkutsk, 2007, vol. 4, pp. 47–61.
4. Vol’fson, G.B., Evstifeev, M.I.., Kasantseva, O.S., Kalinnikov, I.I., Manukin, A.B., Matyunin, V.P., and Shcherbak, A.G., Gradiometric Seismoreceiver with a Magnetic Suspension in the Problems of Operative Earthquake Forecasting, Seism. Instr., 2010, vol. 46, no. 3, pp. 265–274.
5. Khaidarov, M.S., Ilyina, V.V., Nurmagambetov, A., Khaidarov K.A., and Loksha, P.B., Relation of Deviations of Torsion Pendulums with Season Seismicity in the North Tien-Shan. Problems of Destructive Earthquake Disaster Prevention. Proc. Second Kazakhstan-Japan Workshop, 2002, Almaty-EVERO 2003, pp. 235–243.