Jerzy Jelonkiewicz Andrzej Przybyl Accuracy Improvement of Neural Network State Variable Estimator in Induction Motor Drive. 71-77 2008 ICAISC http://dx.doi.org/10.1007/978-3-540-69731-2_8 conf/icaisc/2008 db/conf/icaisc/icaisc2008.html#JelonkiewiczP08