Dai-xi, Liao, Yang Li-hui, and Qian-hong Zhang. 2011. “Existence and Exponential Stability of Periodic Solution for Fuzzy BAM Neural Networks With Periodic Coefficient”. Ukrains’kyi Matematychnyi Zhurnal 63 (12), 1672-84. https://umj.imath.kiev.ua/index.php/umj/article/view/2833.