1. Wassener , B. 2011 http://www.nytimes.com/2011/08/15/business/energy-environment/raising-awareness-of-plastic-waste.html?_r=1&
2. Kaya , E. 2014 https://www.academia.edu/4066905/POLYETHYLENE_PRODUCTION_TECHNOLOGIES
3. DSM 2014 http://www.dsm.com/corporate/about/business-entities/dsm-dyneema.html
4. Bio-ethanol based ethylene;Morschbacker;Polym. Rev.,2009
5. Life cycle assessment of the manufacture of lactide and PLA biopolymers from sugarcane in Thailand;Groot;Int. J. Life Cycle Assess.,2010