2014DIN EN ISO 16827:2014 Non-destructive testing - Ultrasonic testing - Characterization and sizing of discontinuities (ISO 16827:2012); German version EN ISO 16827:2014
2001DIN EN 583-5:2001 Non-destructive testing – Ultrasonic testing – Part 5: Description and sizing of inhomogeneities; German version EN 583-5:2000