Sufficient conditions for permanence of a general periodic single-species system with periodic impulsive perturbations are obtained via comparison theory of impulsive differential equations. An application is given to the periodic impulsive logistic system.
"Permanence of a General Periodic Single-Species System with Periodic Impulsive Perturbations." Japan J. Indust. Appl. Math. 24 (1) 57 - 65, February 2007.