1. ISO 6507:2005, Pts. 1–4. Metallic Materials – Vickers Hardness Test.
2. E. G. Aslanyan, “Metrological support of hardness measurements,” Izmer. Tekhn., No. 1, 45–50 (2005); Measur. Techn., 48, No. 5, 57–63 (2005).
3. E. Aslanyan, A. Doynikov, and V. Pivovarov, “Improvements of the national hardness primary standard machine on Vickers scales,” IMEKO 2010 Conf., Pattaya, Thailand (2010), pp. 351–354.
4. GOST 8.063-2007, GSI. National Verification Scheme for Means of Measuring the Hardness of Metals in Alloys on the Vickers Scale.
5. GOST 8.695-2009, GSI. Metals and Alloys, Hardness Measurements on the Vickers Scale. Part 2. Checking and Calibration of Hardness Gauges.