中国科学院数学与系统科学研究院期刊网
On the Permanence and Extinction in Nonautonomous Lotka-Volterra Comptitive Systems with Delays
Zhi Dong TENG
Acta Mathematica Sinica, Chinese Series . 2001, (2): 293 -306 .  DOI: 10.12386/A2001sxxb0040