1. PWM Inverter Induction Motor Transit Car Drives
2. and . IEEE IECI '79 Conference on Industrial and Control Application of Microprocessors, p. 278, Mar. 1979.
3. Hashizume. Tech. Group I.E.C.E., Japan, PCC79–26, March 1979.
4. Tech. Group I.E.C.E., Japan, PCC78–14, March 1978.