On non-linear Volterra integral-functional equations in several variables
Z. Kamont, M. Kwapisz (1981)
Annales Polonici Mathematici
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Z. Kamont, M. Kwapisz (1981)
Annales Polonici Mathematici
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Karl L. Nickel (1983)
Annales Polonici Mathematici
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Bogdan Rzepecki (1976)
Annales Polonici Mathematici
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K. Orlov, M. Stojanović (1974)
Matematički Vesnik
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R. Smarzewski (1976)
Applicationes Mathematicae
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Štěpánková, H. (2005)
Electronic Journal of Qualitative Theory of Differential Equations [electronic only]
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Domoshnitsky, Alexander, Drakhlin, Michael, Litsyn, Elena (1997)
Memoirs on Differential Equations and Mathematical Physics
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G. Karakostas (1987)
Colloquium Mathematicae
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Z. Jackiewicz, M. Kwapisz (1987)
Applicationes Mathematicae
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Fengde Chen, Xiaoxing Chen, Shouying Huang (2016)
Open Mathematics
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A two species non-autonomous competitive phytoplankton system with Beddington-DeAngelis functional response and the effect of toxic substances is proposed and studied in this paper. Sufficient conditions which guarantee the extinction of a species and global attractivity of the other one are obtained. The results obtained here generalize the main results of Li and Chen [Extinction in two dimensional nonautonomous Lotka-Volterra systems with the effect of toxic substances, Appl. Math....
Tvrdý, Milan (1997)
Memoirs on Differential Equations and Mathematical Physics
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Wojciech Mydlarczyk (1996)
Annales Polonici Mathematici
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We study the equation u = k∗g(u) with k such that ln k is convex or concave and g is monotonic. Some necessary and sufficient conditions for the existence of nontrivial continuous solutions u of this equation are given.
Primo Brandi, Rita Ceppitelli (1986)
Annales Polonici Mathematici
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W. Okrasinski (1993)
Extracta Mathematicae
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