Nonautonomous Lotka-Volterra systems with delays
The author studies a general nonautonomous Lotka-Volterra-type system with delays. A series of sufficient conditions for the ultimate boundedness, permanence, global attractivity, and existence and uniqueness of strictly positive solutions, positive periodic solutions, and almost-periodic solutions are established. These are extensions of results due to \textit{R. Redheffer} [J. Differ. Equations 127, No. 2, 519-541 (1996; Zbl 0856.34056) and ibid. 132, No. 1, 1-20 (1996; Zbl 0864.34043)] given for the corresponding system without delays.
scientific article; zbMATH DE number 1744212