José de Jesús Rubio Wen Yu 0001 Nonlinear system identification with recurrent neural networks and dead-zone Kalman filter algorithm. 2460-2466 2007 70 Neurocomputing 13-15 https://doi.org/10.1016/j.neucom.2006.09.004 db/journals/ijon/ijon70.html#RubioY07