中国科学院数学与系统科学研究院期刊网
Stability and Global Hopf Bifurcation for Neutral Differential Equations
Jun Jie WEI(1),Shi Gui RUAN(2)
Acta Mathematica Sinica, Chinese Series . 2002, (1): 93 -104 .  DOI: 10.12386/A2002sxxb0012