Copyright © 2012 Xiaomei Feng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This paper studies multispecies nonautonomous Lotka-Volterra
competitive systems with delays and fixed-time impulsive effects. The sufficient conditions of integrable form on the permanence of species are established.