1. Beatus, S.M., Berkutov, V.V., and Vol’fson, G.B., Dynamic Errors in a Gyrocompass with a Magnetic Suspension, Vopr. Korablestroeniya. Ser. Navigatsiya i giroskopiya, 1976, no. 20, pp. 24–37.
2. Braginskii, V.B. and Manukin, A.B., Izmerenie malykh sil v fizicheskikh eksperimentakh (Measurement of Weak Forces in Physical Experiments), Moscow: Nauka, 1974.
3. Fremd, V.M., Instrumental’nye sredstva i metody registratsii sil’nykh zemletryasenii (Instrumental Means and Methods of Recording Heavy Earthquakes), Moscow, 1978.
4. Kalinnikov, I.I., Konservativnye sistemy dlya geofizicheskikh issledovanii (Conservative Syatems for Geophysical Research), Moscow, 1983.
5. Kalinnikov, I.I., Matyunin, V.P., Nyunina, N.A., and Getmanskaya, V.V., Operatice Forecasting of Earthquakes in a Teleseismic Zone is a Reality, Dokl. RAN, 1992, vol. 323,no. 6, pp. 1068–1071.