Magnetic materials -- Part 6: Methods of measurement of the magnetic properties of magnetically soft metallic and powder materials at frequencies in the range 20 Hz to 100 kHz by the use of ring specimens ((IEC 60404-6:2018 + COR1:2018) EN IEC 60404-6:2018) (english version)
Terms and nomenclature for cores made of magnetically soft ferrites -- Part 3: Guidelines on the format of data appearing in manufacturers catalogues of transformer and inductor cores (IEC 60401-3:2015) (english version)
