bibitem{R1}
Ahmadkhanlou F., Adeli H. (2005). ``Optimum cost design of reinforced concrete slabs using neural dynamics model", Engineering Applications of Artificial Intelligence, 18, 65--72.
bibitem{R2} Amari S.I., Cichocki A. (1998). ``Adaptive blind signal processing-neural network approaches", Proceedings of the IEEE, 86, 2026--2048.
bibitem{ZD} Dadi Z. (2017). ``Dynamics of two-cell systems with discrete delays", Advances in Computational Mathematics, 43:3, 653--676.
bibitem{G2} Golubitsky M., Pivato M., Stewart I. (2004). ``Interior symmetry and local bifurcation in coupled cell networks", Dynamical Systems, 19:4, 389--407.
bibitem{G3} Golubitsky M., Stewart I. (2006). ``Nonlinear dynamics of networks: the groupoid formalism", Bulletin of the American Mathematical Society, 43, 305--364.
bibitem{G} Golubitsky M., Stewart I., Buono P.L., Collins J.J. (1998). ``A modular network for legged locomotion", Physica D, 115, 56--72.
bibitem{G4} Golubitsky M., Stewart I., T"{o}r"{o}k A. (2005). ``Patterns of synchrony in coupled cell networks with multiple arrows", SIAM Journal on Applied Dynamical Systems, 4:1, 78--100.
bibitem{R3} Guo S., Huang L. (2003). ``Hopf bifurcating periodic orbits in a ring of neurons with delays", Physica D, 183, 19--44.
bibitem{dj} Javidmanesh E., Dadi Z., Afsharnezhad Z., Effati S. (2014). ``Global stability analysis and existence of periodic solutions in an eight-neuron BAM neural network model with delays", Journal of Intelligent and Fuzzy Systems, 27:1, 391--406.
bibitem{R4} Jiang F., Shen J., Li X. (2013) ``The LMI method for stationary oscillation of interval neural networks with three neuron activations under impulsive effects", Nonlinear Analysis: Real World Applications, 14:3, 1404--1416.
bibitem{R5} Kwon O.M., Kwon J.W., Kim S.H. (2011). ``New results on stability criteria for neural networks with time-varying delays", Chinese Physics B, 20:5, 050505.
bibitem{R6} Kwon O.M., Park M., Lee S.M., Park J.H., Cha E.J. (2013). ``Stability for neural networks with time-varying delay via some new approaches",
IEEE Transactions on Neural Networks and Learning Systems, 24:2, 181--193.
bibitem{R7} Li H., Liao X., Li C., Huang H., Li C. (2011). ``Edge detection of noisy images based on cellular neural networks", Communications in Nonlinear Science and Numerical Simulations, 16:9, 3746--3759.
bibitem{R9} Luo R., Xu H., Wang W.S., Sun J., Xu W. (2016). ``A weak condition for global stability of delayed neural networks", Journal of Industrial and Management Optimization, 12:2, 505--514.
bibitem{R10} Shen Y., Wang J. (2012). ``Robustness analysis of global exponential stability of recurrent networks in the presence of time delays and random disturbances", IEEE Transactions on Neural Networks and Learning Systems, 23:1, 87--96.
bibitem{R11} Shu Y., Liu X., Liu Y. (2016). ``Stability and passivity analysis for uncertain discrete-time neural networks with time-varying delay", Neurocomputing, 173:3, 1706--1714.
bibitem{R12} Song Y., Han M., Wei J. (2005). ``Stability and Hopf bifurcation on a simplified BAM neural network with delays", Physica D: Nonlinear Phenomena, 200, 185--204.
bibitem{R13} Tian J., Xie X. (2010). ``New asymptotic stability criteria for neural networks with time varying delay", Physics Letters A, 374:7, 938--943.
bibitem{S} Stewart I., Golubitsky M., Pivato M. (2003). ``Symmetry groupoids and patterns of synchrony in coupled cell networks", SIAM Journal on Applied Dynamical Systems, 2:4, 606--646.
bibitem{R15} Wei J., Li M.Y. (2004). ``Global existence of periodic solutions in a tri-neuron network model with delays", Physica D, 198, 106--119.
bibitem{R16} Wei J.J., Velarde M.G. (2004). ``Bifurcation analysis and existence of periodic solutions in a simple neural network with delays", Chaos, 143, 940--953.
bibitem{R17}Yan X.P. (2006). ``Hopf bifurcation and stability for a delayed tri-neuron network model", Journal of Computational and Applied Mathematics, 196, 579--595.
bibitem{R8} Yiping L., Lemmert R., Volkmann P. (2001). ``Bifurcation of periodic solution in a three-unit neural network with delay", Acta Mathematicae Applicatae Sinica, 17:3, 375--381.
bibitem{R18}Yuan Y. (2007). ``Dynamics in a delayed-neural network", Chaos, Solitons and Fractals, 33:2, 443--454.
bibitem{R19} Zeng Z., Huang D.S., Wang Z. (2008). ``Pattern memory analysis based on stability theory of cellular neural networks", Applied Mathematical Modelling, 32:1, 112--121.
bibitem{R20} Zeng Z., Wang J. (2007). ``Analysis and design of associative memories based on recurrent neural networks with linear saturation activation functions and time-varying delays", Neural computation, 19:8, 2149--2182.
bibitem{R21} Zheng M., Mao Z., Li K., Fei M. (2016). ``Quadratic separation framework for stability analysis of a class of systems with time delays",
Neurocomputing, 174, 466--474.
bibitem{R22} Zheng C.D., Shan QH, Wang Z. (2012). ``Novel stability criterion for cellular neural networks: an improved Gu's discretized LKF approach", Journal of the Franklin Institute, 349:1, 25--41.
bibitem{R23} Zou S., Huang L., Wang Y. (2010). ``Bifurcation of a three-unit neural network", Applied Mathematics and Computation, 217:2, 904--917.