1. (1) K. Yamazaki : “Recent Development in Magnetically Shielded Room”, The Papers of Technical Meeting on Magnetics, IEE Japan, MAG-99-7, pp. 35-45 (1999-3) (in Japanese)
2. (2) K. Kato, K. Yamazaki, H. Matsuba, C. Sumi, and S. Sato : “Active magnetic shield for biomagnetic measurements”, Proc. of the 12 International Conference on Biomagnetism., pp. 965-967, Helsinki Univ. of Technology, Espoo, Finland (2000)
3. (3) H. J. M. ter Brake, R. Huonker, and H. Rogalla : “New results in active noise compensation for magnetically shielded rooms”, Meas. Sci. Technol., Vol. 4, pp. 1370-1375 (1993)
4. (4) D. Platzek, H. Nowak, F. Giessler, J. Röther, and M. Eiselt : “Active shielding to reduce low frequency disturbances in direct current near biomagnetic measurements”, Rev. Sci. Instrum., Vol. 70, No. 5, pp. 2465-2470 (1999)
5. (5) M. Skakala, V. Zurbec, and J. Manka : “Active compensation for ambient magnetic noise in the unshielded environment”, Meas. Sci. Technol., Vol. 4, pp. 468-472 (1993)