[21] SAMOILENKO, A. M.—PERESTYUK, N. A.: Impulsive Differential Equations , World Scientific, Singapore, 1995. [22] WEI, C.—CHEN, L.: Periodic solution and heteroclinic bifurcation in a predator-prey system with Allee effect and impulsive harvesting , Nonlinear Dynamics 76 (2014), 1109–1117. [23] WEI, C.—CHEN, L.: Heteroclinic bifurcations of a prey-predator fishery model with impulsive har- vesting , International Journal of Biomathematics 6 (2013), 1350031. [24] YANG, Y.—CAO, J.: Stability and periodicity in delayed cellular neural networks with impulsive effects , Nonlinear Analysis: Real World Applications 8 (2007), 362–374. [25] YANG, T.—CHUA, L. O.: Impulsive stabilization for control and synchronization of chaotic sys- tems: theory and application to secure communication , IEEE Transactions on Circuits and Systems- I: Fundamental Theory and Applications 44 (1997), 976–988. [26] ZHANG, Q.: Existence and multiplicity of fast homoclinic solutions for a class of damped vibration problems with impulsive effects , Abstract and Applied Analysis 2014 (2014), 960276. [27] ZHANG, H.—LI, Z.: Periodic and homoclinic solutions generated by impulses , Nonlinear Analysis: Real World Applications 12 (2011), 39–51. [28] ZHOU, Q.: Global exponential stability of BAM neural networks with distributed delays and impulses , Nonlinear Analysis: Real World Applications 10 (2009), 144–153. 13