1. Mosekilde, E.: Topics in Nonlinear Dynamics; Applications to Physics, Biology and Economic Systems. World Scientific Publishing (2002)
2. Petrov, L.F.: Methods for Dynamic Economic Analysis. Infra-M, Moscow (2010). (in Russian)
3. Kryukov, B.I.: Forced Oscillations of Essentially Nonlinear Systems. Mashinostroenie, Moscow (1984). (in Russian)
4. Nekorkin, V.I.: Introduction to Nonlinear Oscillations. Wiley-VCH, Weinheim (2015)
5. Aguilar, L.T., Boiko, I., Fridman, L., Iriarte, R.: Self-oscillations in Dynamic Systems. Birkhäuser, Basel (2015)