(1) Lingling Liu, O. Ozgur Aybar, Valery G. Romanovski, Weinian Zhang*, Identifying weak foci and centers in the Maxwell-Bloch system, Journal of Mathematical Analysis and Applications, 2015, 430(1): 549-571 (2) Lingling Liu, Bo Gao, Dongmei Xiao, Weinian Zhang*, Identification of focus and center in a 3-dimensional system, Discrete and Continuous Dynamical Systems - Series B, 2014, 19(2): 485-522 (3) Lingling Liu, Bo Gao*, Conditions for appearance and dis appearance of limit cycles in the Shimizu-Morioka system, International Journal of Bifurcation and Chaos, 2011, 219: 2489-2503 (4) Qiuyan Zhang, Lingling Liu*,Weinian Zhang, Local bifurcations of the Enzyme-Catalyzed reaction comprising a branched network, International Journal of Bifurcation and Chaos, 2015, 25(6):1550081 (5) Qiuyan Zhang, Lingling Liu,Weinian Zhang*, Bogdanov-Takens Bifurcations in the Enzyme-Catalyzed reaction comprising a branched network, Mathematical Biosciences and Engineering, 2017, 14(5): 45-60. (6) Fang Xu*, Lingling Liu and Jianying Xiao, Analysis of the equilibrium points of background neural networks with uniform firing rate, Advances in Difference Equations, 2017 (314): 1-11. |