1. ASTM D5338-98(2003) Standard Test Method for Determining Aerobic Biodegradation of Plastic Materials Under Controlled Composting Conditions;ASTM,2003
2. ASTM D6868-03 Standard Specification for Biodegradable Plastics Used as Coatings on Paper and Other Compostable Substrates;ASTM,2003
3. ASTM D6400-04 Standard Specification for Compostable Plastics;ASTM,2004
4. ASU, 2010. Arizona State University Carbon Neutrality Action Plan, Global Institute of Sustainability at Arizona State University.
5. ASU, 2014. Zero Waste. (retrieved 18.06.14).