Kutnyi, A. M., and T. M. Babich. 2010. “Accuracy Increase of Determination of Resonance Effect of Liquid Core of the Earth on the earth’s Tides”. Geofizicheskiy Zhurnal 32 (3):140-42. https://doi.org/10.24028/gzh.0203-3100.v32i3.2010.117548.