1. Deutsches Institut für Normung, 1998. Testing of the compostability of polymeric materials – German standard DIN V 54900 parts 1–3
2. European Standard EN 13432, (Draft 1999). Requirements for packaging recoverable through composting and biodegradation – Test scheme and evaluation criteria for the final acceptance of packaging
3. International Standard ISO 9408, 1999. Water quality – Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium by determination of oxygen demand in a closed respirometer
4. International Standard ISO 9439, 1999. Water quality – Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium – Carbon dioxide evolution test
5. International Standard ISO 14851, 1999. Plastics – Determination of the ultimate aerobic biodegradability of plastic materials in an aqueous medium – Method by determining the oxygen demand in a closed respirometer