Lubricants, industrial oils and related products (class L) - Classification - Part 4: Family H (Hydraulic systems) (ISO 6743-4:1999); German version EN ISO 6743-4:2001— 5 стр.
Lubricants, industrial oils and related products (class L) - Classification - Part 12: Family Q (heat transfer fluids); identical with ISO 6743-12:1989— 3 стр.