The inner structure of the attractor appearing when the Varley-Gradwell-Hassell population model bifurcates from regular to chaotic behaviour is studied. By algebraic and geometric arguments the coexistence of a continuum of neutrally stable limit cycles with different periods in the attractor is explained.
Botella Soler, Vicente Oteo Araco, José Ángel Ros Pallarés, José 2012 Coexistence of periods in a bifurcation Chaos Solitons & Fractals 45 5 681 686
