1. Non-linear oscillations, dynamical systems, and bifurcations of vector fields;Guckenheimer,1983
2. Ordinary differential equations, in dynamical systems I;Arnold,1988
3. The predator-prey model;Peschel,1986
4. Normal forms and Painlevé analysis;Brenig,1994
5. Complete factorisation and analytic solutions of generalized Lotka-Volterra equations