Hongyi Li Bing Chen Chong Lin Qi Zhou Mean square exponential stability of stochastic fuzzy Hopfield neural networks with discrete and distributed time-varying delays. 2017-2023 2009 72 Neurocomputing 7-9 http://dx.doi.org/10.1016/j.neucom.2008.12.006 db/journals/ijon/ijon72.html#LiCLZ09