1. International Earth Rotation and Reference Systems Service - IERS Annual Reports, URL: http://www.iers.org
2. W.H. Munk and G. J. F. McDonald, The Rotation of the Earth. A Geophysical Discussion (Cambridge University Press, New York, 1963; Mir, Moscow, 1964).
3. L.D. Akulenko, S.A. Kumakshev, Yu.G. Markov, and L.V. Ryhlova, “A Gravitational-Tidal Mechanism for the Earth’s PolarOscillations,” Astr. Zh. 82 (10), 950–960 (2005) [Astr.Rep. (Engl. Transl.) 49 (10), 847-857 (2005)].
4. L. D. Akulenko, D.M. Klimov, Yu. G. Markov, and V.V. Perepelkin, “Oscillatory-Rotational Processes in the Earth Motion about the Center of Mass: Interpolation and Forecast,” Izv. Ros. Akad. Nauk. Mekh. Tv. Tela, No. 6, 6–29 (2012) [Mech. Sol. (Engl. Transl.) 47 (6), 601-621 (2012)].
5. D. M. Klimov, L.D. Akulenko, and S.A. Kumakshev, “The Main Properties and Peculiarities of the Earth’s Motion Relative to the Center of Mass,” Dokl. Ros. Akad. Nauk 458 (5), 547–550 (2014) [Dokl. Phys. (Engl. Transl.) 59 (10), 472—475 (2014)].