Al Olah، A. A. I.، و Shepherd، W. (1986). Microprocessor Controlled Three - Phase Inverter for Variable - Speed Induction Motor Drive: Development of A Microprocessor Based Logic System for the Control of the Operation of A Three - Phase , Neutral Point Clamped Inverter Used to Control the Speed of A Three - Phase Induction Motor (رسالة دكتوراه غير منشورة). University of Bradford، برادفورد. مسترجع من http://search.mandumah.com/Record/600350
Al Olah، Abd Alrahman Ib.، و W. Shepherd. "Microprocessor Controlled Three - Phase Inverter for Variable - Speed Induction Motor Drive: Development of A Microprocessor Based Logic System for the Control of the Operation of A Three - Phase , Neutral Point Clamped Inverter Used to Control the Speed of A Three - Phase Induction Motor" رسالة دكتوراه. University of Bradford، برادفورد، 1986. مسترجع من http://search.mandumah.com/Record/600350