Positive Periodic Solutions in a Discrete Time Three Species Competition System by Changjin Xu, Yusen Wu

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Permanence in a Discrete Mutualism Model with Infinite Deviating Arguments and Feedback Controls by Changjin Xu, Yusen Wu

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On the Nature of Bifurcation in a Ratio-Dependent Predator-Prey Model with Delays by Changjin Xu, Yusen Wu

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Limit Cycles and Analytic Centers for a Family of 4n-1 Degree Systems with Generalized Nilpotent Singularities by Yusen Wu, Cui Zhang, Changjin Xu

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Linearizability Problem of Resonant Degenerate Singular Point for Polynomial Differential Systems by Yusen Wu, Cui Zhang, Luju Liu

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