1. V. O. Kononenko, 1. (1969), Vibrating System with a Limited Power-supply, Iliffe, London.
2. A. Yu. Shvets and A. M. Makaseyev, 2. (2014), Mathematical Simulation of the Influence of Delay Factors on the Oscillations of Non-ideal Pendulum Systems, Proceedings of Institute of Mathematics of National Academy of Sciences of Ukraine. Vol. 11, Number 5. P. 269–297.
3. A. Yu. Shvets and A. M. Makaseyev, 3. (2014), Chaos in Pendulum Systems with Limited Excitation in the Presence of Delay. Chaotic Modeling and Simulation (CMSIM), 3:233–241, 2014.
4. A. Yu. Shvets and Yu. A. Mitropolsky, 4. (1980), About influence of delay on a stability of a pendulum with the vibrating suspension point. Analytical methods of non-linear oscillations. Kyiv, P. 115–120.
5. T. S. Krasnopolskaya and A. Yu. Shvets, 5. (2008), Regular and chaotical dynamics of systems with limited excitation. R&C Dynamics, Moscow.