Hosseinzadeh, M., Sadoughi, A. . “Classical Direct Torque and Flux Control (DTFC) for Line-Start Permanent Magnet Synchronous and Its Comparison with Induction Motors During Voltage Sag Conditions.” Nashriyyah -i Muhandisi -i Barq va Muhandisi -i Kampyutar -i Iran, vol. 13, no. 1, 2015, pp. 25-35.