Metallic materials; hardness test; tables of Vickers hardness values for use in tests made on flat surfaces; HV 0,2 to less than HV 5; identical with ISO 409/2, edition 1983— 14 стр.
Metallic materials - Vickers hardness test - Part 2: Verification and calibration of testing machines (ISO 6507-2:2005); German version EN ISO 6507-2:2005— 25 стр.