Periodic solutions for a three species predator–prey system on time scales
by Kejun Zhuang
International Journal of Dynamical Systems and Differential Equations (IJDSDE), Vol. 3, No. 1/2, 2011

Abstract: This paper investigates the existence of periodic solutions for an ecological model with two predators and one prey. Sufficient conditions are derived by using degree theory. Our results improve and extend previous results in the literature.

Online publication date: Sat, 24-Jan-2015

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