Model reference adaptive system and pseudo-sliding mode control with exponential reaching law for sensorless-speed control of PMSM - Djaloul Karboua; Toufik Mebkhouta; Said Benkaihoul; Youcef Chouiha; Belgacem Toual; Zuhair A. Alqarni; Ahmad F. Tazay; Mohamed I. Mosaad (PLoS ONE)