@misc{Covačev_Valery_Periodicity, author={Covačev, Valery}, howpublished={online}, publisher={Zielona Góra: Uniwersytet Zielonogórski}, language={eng}, abstract={For an age-dependent model with a dominant age class an ?-periodic regime the population size is sought by means of impulsive perturbations. For both noncritical and critical cases of first order the problem is reduced to operator systems solvable by a convergent simple iteration method.}, type={artykuł}, title={Periodicity of the population size of an age-dependent model with a dominant age class by means of impulsive perturbations}, keywords={population dynamics, age-dependent model, periodic solutions, nonlinear delay equations}, }