1. ÇELIK, C.: The stability and Hopf bifurcation for a predator–prey system with time delay, Chaos, Solitons and Fractals 37 (2008), 87–99.
2. DONG, E.—YU, H.—TONG, J.—WANG, Z.: Divergence measure on a modified Sprott C system, IEEE Access 9 (2021), 88959–88969.
3. GUCKENHEIMER, J.—HOLMES, P.: Nonlinear Oscillations, Dynamical Systems and Bifurcations of Vector Fields, Vol. 42. Springer Science and Business Media, New York, 1st edition, 2013.
4. HASSARD, B. D.—KAZARINOFF, N. D.—WAN, Y.-H.—WAN, Y. W.: Theory and Applications of Hopf Bifurcation. In: Lecture Notes Series Vol. 41. Cambridge University Press, Cambridge-New York, 1981.
5. HAYNES, R. D.: Invariant Manifolds of Dynamical Systems: Theory and Computation. Master’s Thesis, Simon Fraser University (Canada), 1999.