Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 2: Spectrophotometric method (ISO 6271-2:2004); German version EN ISO 6271-2:2004— 9 стр.
Lubricants, industrial oils and related products (class L) - Family H (Hydraulic systems) - Specifications for categories HETG, HEPG, HEES and HEPR (ISO 15380:2002)— 26 стр.