1. A. Andronov, E. Leontovich, I. Gordon, A. Maier, Theory of bifurcations of dynamical systems on a plane, in: Israel program for Sci. Trans., Jerusalem, 1971
2. An Introduction to Dynamical Systems;Arrowsmith,1990
3. Dynamical Systems. Differential Equations, Maps and Chaotic Behaviour;Arrowsmith,1992
4. Extinction thresholds: Insights from simple models;Bascompte;Annales Zoologici Fennici,2003
5. Multiple Allee effects and population management;Berec;Trends in Ecology and Evolution,2007