1. A. A. Andronov, “Les cycles limites de Poincare et la theorie des oscillations auto-entretenues,” C. R. Acad. Sci. 189, 559–561 (1929).
2. A. A. Andronov, E. A. Leontovich, I. I. Gordon, and A. G. Maier, Theory of Bifurcations of Dynamic Systems on a Plane (Nauka, Moscow, 1967; Israel Program for Scientific Transl., Jerusalem, 1971).
3. L. D. Akulenko, D. D. Leshchenko, and F. L. Chernous’ko, “ Fast motion of a heavy rigid body aboud a fixed point in a resistive medium,” Izv. Akad. Nauk, Mekh. Tverd. Tela, No. 3, 5–13 (1982).
4. E. S. Shalimova, “Steady and periodic modes in the problem of motion of a heavy material point on a rotating sphere (the viscous friction case),” Mosc. Univ. Mech. Bull. 69 (4), 89 (2014).
5. Yu. D. Selyutskiy, “Dynamics of an elastically mounted wing in flow,” AIP Conf. Proc. 2046, 020085-1 (2018).