1. R. Harracksingh ICIS Chemical Business 2012 http://www.icis.com/resources/news/2012/07/02/9573828/bioplastics-surge-towards-commercialization/
2. http://www.plasticseurope.org/
3. http://www.plasticplanet-derfilm.at/hartefakten/hartefakten.html
4. http://www.plasticstoday.com/articles/recycling-for-PET-packaging-reaches-31-percent-in-2013-141008