K. Gopalsmy, I. Leung, Delay induced periodicity in a neural network of excitation and inhibition.[J].Physica D.1996,89:395-K. Gopalsmay, Issic K. C. Leung, Convergence under dynamical thresholds with delays, IEEETrans. on Neural Networks, 1994, NN-8(2), 341-348.L. Olien, J. Belair, Bifurcations, stability and monotonicity properties of a delayed neural networkmodel.[J]. Physica D.1997,102:349-J. Belair, S. Dufour, Stability in a three-dimensional system of delay-differential equations, Can.Appl. Math. Quart., 1996, 4(2), 135-156.廖晓峰,吴中福,虞厥邦,带分布时延神经网络,从稳定到振荡再到稳定的动力学现象,电子科学学刊,2001,23(7),687-692.王炎,廖晓峰,吴中福,虞厥邦,一个带时延神经网络的分岔现象研究,电子科学学刊,2000,22(6),972-977.Xiaofeng Liao, Zhongfu, Juebang Yu, Hopf bifurcation analysis of a neural system with a continuously distributed delay, International Symposium on Signal Processing and Intelligent System,Guangzhou, China, Nov. 1999. ［8］Xiaofeng Liao, Zhongfu, Juebang Yu, Stability switches and bifurcation analysis of a neuralnetwork with continuously distributed delay, IEEE Trans. on SMC-I, 1999, SMC-I-29(6), 692-696.Xiaofeng Liao, Kwok-wo Wong, Zhongfu Wu, Bifurcation analysis in a two-neuron system withcontinuously distributed delays, Accepted by Physical D, to appear. ［10］K. Jack Hale, Sjoerd M. Verduyn Lunel, Introduction to Functional Differential Equations, NewYork, Springer-verlag, Inc., 1993.B. D. Hassard, N. D. Kazarinoff, Y. H. Wan, Theory and Applications of Hopf Bifurcation,London, Cambridge, Univ, Press, 1981.