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.
Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 4: Vickers, Knoop and Rockwell superficial hardness; German version EN 843-4:2005— 24 стр.
Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 4: Vickers, Knoop and Rockwell superficial hardness