Petroleum products - Determination and application of precision data in relation to methods of test (ISO 4259:1992 + Cor 1:1993); German version EN ISO 4259:1995— 40 стр.
BS ISO 6521-3. Lubricants, industrial oils and related products (Class L). Family D (compressors). Part 3. Specifications of categories DRA, DRB, DRC, DRD, DRE, DRF and DRG (lubricants for refrigerating compressors)— 21 стр.