%0 Journal Article
%A Covachev, V.
%T Periodicity of the Population Size of an Age-Dependent Model With a Dominant Age Class by Means of Impulsive Perturbations
%J International Journal of Applied Mathematics and Computer Science
%D 2000
%P 147-155
%V 10
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IJAMCS_2000_10_1_a8/
%G en
%F IJAMCS_2000_10_1_a8