Metallic materials - Vickers hardness test - Part 2: Verification and calibration of testing machines (ISO 6507-2:2005); German version EN ISO 6507-2:2005— 28 стр.
Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) -- Supplement 1: Propagation of distributions using a Monte Carlo method— 98 стр.