2015NF C28-901-5*NF EN 60404-5:2015 Magnetic materials - Part 5 : permanent magnet (magnetically hard) materials - Methods of measurement of magnetic properties
2008NF C28-901-5:2008 Magnetic materials - Part 5 : permanent magnet (magnetically hard) materials - Methods of measurement of magnetic properties.
2004NF C28-919:2004 Magnetic materials - Permanent magnet (magnetically hard) materials - Methods of measurement of magnetic properties.