中国科学院数学与系统科学研究院期刊网
Periodic Solutions of a Class of Nonlinear Functional Differential Equations and Global Attractivity
Xian Hua TANGYing Gao ZHOU
Acta Mathematica Sinica, Chinese Series . 2006, (4): 899 -908 .  DOI: 10.12386/A2006sxxb0111