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M. Przybylski | B. Ślusarek | B. Jankowski | D. Kapelski | M. Karbowiak
[1] Geoffrey Hilton,et al. IEC Magnetic Materials 60404 - Part 6: Methods of measurement of the magnetic properties of magnetically soft metallic and powder materials at frequencies in the range 20 Hz to kHz by the use of ring specimens , 2003 .