1. ISO 6508-1: 2005 Metallic Materials-Rockwell Hardness Test – Part 1: Test Method (scales A,B,C,D,E,F,G,H,K,N,T).
2. ISO 6507-1: 2005 Metallic Materias-Vickers hardness test – Part 1: Test Method.
3. R. Samuel, Low: Rockwell Hardness Measurement of Metallic Materials, NIST Recommended Practice Guide, Special Publication 960-5, 2001.
4. F. Petik, Factor Influencing Hardness Measurement (A Systematic Survey of Research Results), Bureau International de Metrologie Legale, Paris, 1983.
5. Vibration in Structures;Bachmann,1987