1Pineda F J.Generalization of back propaga-tion to Recurrent neural networks[J].Physical Rev.Lett,1987,59:2229-2232.
2Willams R J,Zipser D A.learning algorithm for continually running fully recurrent neural networks[J].Neural Computation,1989,1:270-280.
3Xu Dongpo,Li Zhengxue,Wu Wei.Convergence of gradient descent algorithm for a recurrent neuron[C]//Lecture Notes in Computer Science,ISNN 2007,PartⅢ,LNCS 4493,117-122.