[1] Agliari, A., Gardini L., Puu T.: Some global bifurcations related to the appearance of closed invariant curves, Mathematics and Computers in SimulationVolume 68, Issue 3, , 1 May 2005, Pages 201-219.

[2] Asada T., Douskos Ch., Markellos P.: Numerical Exploration of Kaldorian Macrodynamics: Hopf- Neimark Bifurcations and Business Cycles with Fixed Exchange Rates, 2007

[3] Buša J., Hnatič M.: Chaos, úvod do problematiky, 2004

[4] Bischi G.I., Dieci R., Rodano G., Slatari E.: Multiple attractors and global bifurcations in a Kaldor-type business cycle model, 2001

[5] Dieci R., Sordi S., Vercelli A.: Financial Fragility and Complex Dynamics: Analysing the Impact of Stabilizing Policy Measures, 2005

[6] Roth V.: Computation and Visualisation of Bifurcation Diagrams for Non-Invertible 3D Maps Rigorous Thesis, 2006

[7] Voorn G.: PhD mini course: Introduction to bifurcation analysis, 2006

[8] Weisstein, Eric W. : MathWorld -- A Wolfram Web Resource.

[9] Wiens E. G.: Egwald Mathematics: Nonlinear Dynamics

[10] Yan, Z.: Hopf bifurcation in the Lorenz-type chaotic system, Chaos, Solitons & Fractals Volume 31, Issue 5, , March 2007, Pages 1135-1142.