中国科学院数学与系统科学研究院期刊网
The Existence and Uniqueness of Periodic Solutions to Higher Dimensional Periodic System with Delay

JinDe Chao(1),YongKun Li(2)

Acta Mathematica Sinica, Chinese Series . 1997, (2): 280 -286 .  DOI: 10.12386/A1997sxxb0035