1. Y.V. Barkin, Pis'ma v Astronomicheskii Zhurnal 6 (1980) 377.
2. Y.V. Barkin, Kosmicherkie Issledovaniya 15 (1985) 26.
3. J.A. Beck, C.D. Hall, Relative equilibria of a rigid satellite in a circular Keplerian orbit. AAS/AIAA Astrodynamics Specialist Conference, Paper AAS 97-678, 1997.
4. V.V. Belestskii, Motion of a satellite about its mass center, Nauka, Moscow, 1965.
5. R. Cid, A. Vigueras, Celestial Mechanics 36 (1985) 135.