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3. V.V. Beletskii and E. K. Lavrovskii, “On the Theory of the ResonanceRotation ofMercury,” Astron. Zh. 52(6), 1299–1308 (1975) [Sov. Astron. (Engl. Transl.) 19 (6), 776–781 (1976)].
4. A. P. Markeev, Linear Hamiltonian Systems and Several Problems of Stability of Satellite Motion about the Center of Mass (NITs “Regular and Chaotic Dynamics,” Institute for Computer Studies, Moscow-Izhevsk, 2009) [in Russian].
5. A. P. Markeev, “Stability of EquilibriumStates of Hamiltonian Systems: a Method of Investigation,” Izv. Akad. Nauk. Mekh. Tverd. Tela, No. 6, 3–12 (2004) [Mech. Solids (Engl. Transl.) 39 (6), 1–8 (2004)].