1. T. Yabe and M. Ohno, in: Tech. Digest of 8th Sensor Symp. (1989) p. 259.
2. Tech. Rep. of Fuji Electric Co. (1989).
3. K. Mohri and K. Shimizu, in: Tech. Digest of 7th Sensor Symp. (1989) p. 95.
4. 300 A current sensor using amorphous wire core (invertor control of AC motors)