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IEEE Translation Journal on Magnetics in Japan > 1994 > 9 > 2 > 174 - 178
IEEE Translation Journal on Magnetics in Japan > 1993 > 8 > 1 > 52 - 56
Transactions of the American Institute of Electrical Engineers. Part III:... > 1953 > 72 > 2-III > 1193 - 1196