中国科学院数学与系统科学研究院期刊网
A Note On Linearized Oscillations for Even-Oroder Neutral Differential Equations
Yong Kun LI,Gui Tong XU
Acta Mathematica Sinica, Chinese Series . 2000, (3): 531 -534 .  DOI: 10.12386/A2000sxxb0068