New conditions for exponential stability of delay impulsive neural networks. - Zhichun Yang; Daoyi Xu; Jin Deng; Jianren Niu (ICECS, 2004)

Further results on the bounds of the zeros of quasi-critical polynomials. - Zifang Zhang; Daoyi Xu; Jianren Niu (IEEE Trans. Autom. Control., 2004)