1. The Theory of Bifurcations of Dynamical Systems on a Plane;Andronov,1971
2. The Theory of Dynamical Systems on a Plane;Andronov,1973
3. Systèmes grossiers;Andronov;Doklady Akademii Nauk SSSR,1937
4. Theory of Oscillations;Andronov,1966
5. Bifurcation theory;Afraimovich,1989