1. Metallography Principles and Practice;Van der Voort,1984
2. ASM Metals Handbook, Mechanical Testing, vol. 8, 9th ed., ASM Ohio, 1985.
3. Vickers indentation curves of elastoplastic materials;Loubet,1986
4. ASTM E 92 Standard Test Method For Vickers Hardness of Metallic Materials, 1997.
5. ASTM E 384 Standard Test Method Microhardness of Materials, 1997.