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Permanence of populations in a polluted environment. (English) Zbl 0817.92018

Summary: Studies of several population-toxicant models are discussed. Under the hypothesis that the exogenous input of toxicant into the environment is periodic in time, the conditions for permanence of populations are obtained.

MSC:

92D40 Ecology
34C99 Qualitative theory for ordinary differential equations
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References:

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