Akhmetov MU, Perestyuk NA (1989) Almost-periodic solutions of nonlinear impulse systems. Ukrain Math J 41(3):259–263
Ding H-S, Liang J, Xiao T-J (2008) Existence of almost periodic solutions for SICNNs with time-varying delays. Phys Lett A 372(33):5411–5416
Fan Q-Y, Shao J-Y (2010) Positive almost periodic solutions for shunting inhibitory cellular neural networks with time-varying and continuously distributed delays. Commun Nonlinear Sci Numer Simul 15(6):1655–1663
Guo S-J, Huang L-H (2005) Periodic oscillation for a class of neural networks with variable coefficients. Nonlinear Anal Real World Appl 6(3):545–561
Jiang H-J, Zhang L, Teng Z-D (2005) Existence and global exponential stability of almost periodic solution for cellular neural networks with variable coefficients and time-varying delays. IEEE Trans Neural Netw 16(6):1340–1351
Liu B-W, Huang L-H (2005) Existence and exponential stability of almost periodic solutions for Hopfield neural networks with delays. Neurocomputing 68:196–207
Liu Y-G, You Z-S, Cao L-P (2006) On the almost periodic solution of generalized Hopfield neural networks with time-varying delays. Neurocomputing 69(13–15):1760–1767
Liu Y-G, You Z-S, Cao L-P (2007) On the almost periodic solution of cellular neural networks with distributed delays. IEEE Trans Neural Netw 18(1):295–300
Liu Y-G, You Z-S, Cao L-P (2007) Almost periodic solution of shunting inhibitory cellular neural networks with time varying and continuously distributed delays. Phys Lett A 364(1):17–28
Liu Y-G, You Z-S, Cao L-P (2006) On the almost periodic solution of generalized shunting inhibitory cellular neural networks with continuously distributed delays. Phys Lett A 360(1):122–130
Mohamad S (2003) Convergence dynamics of delayed Hopfield-type neural networks under almost periodic stimuli. Acta Applicandae Mathematicae. Int Survey J Apply Math Math Appl 76(2):117–135
Alzabut JO (2010) Almost periodic solutions for an impulsive delay Nicholson’s blowflies model. J Comput Appl Math 234(1):233–239
Perestyuk NA, Akhmetov MU (1987) Almost-periodic solutions of impulse systems. Ukrainian Math J 39(1):61–66
Papini D, Taddei V (2005) Global exponential stability of the periodic solution of a delayed neural network with discontinuous activations. Phys Lett A 343(1–3):117–128
Shao J-Y, Wang L-J, Ou C (2009) Almost periodic solutions for shunting inhibitory cellular neural networks without global Lipschitz activity functions. Appl Math Model 33(6):2575–2581
Stamov GT (2000/2001) Separated and almost periodic solutions for impulsive differential equations. Note di Matematica 20(2):105–113
Stamov GT (2004) Impulsive cellular neural networks and almost periodicity, proceedings of the Japan academy. Ser A Math Sci 80(10):198–203
Wang L-L, Wen-Lian L, Chen T-P (2009) Multistability and new attraction basins of almost-periodic solutions of delayed neural networks. IEEE Trans Neural Netw 20(10):1581–1593
Xiang H-J, Cao J-D (2009) Almost periodic solutions of recurrent neural networks with continuously distributed delays. Nonlinear Anal Theory Methods Appl 71(12):6097–6108
Yang X-F, Liao X-F, Evans DJ, Tang Y (2005) Existence and stability of periodic solution in impulsive Hopfield neural networks with finite distributed delays. Phys Lett A 343(1–3):108–116
Yang Z-C, Xu D-Y (2006) Existence and exponential stability of periodic solution for impulsive delay differential equations and applications. Nonlinear Anal 64(1):130–145
Zhang L-J, Shi B (2008) Existence and global exponential stability of almost periodic solution for CNNs with variable coefficients and delays. J Appl Math Comput 28(1–2):461–472