1. Alba Trees In-person interview date: 06 November 2019.
2. Life cycle assessment of the production and use of polypropylene tree shelters;Arnold;J. Environ. Manag.,2012
3. Water & Climate Risks Facing U.S. Corn Production How Companies & Investors Can Cultivate Sustainability A Ceres Report;Barton,2014
4. Review of Plastic Footprint Methodologies;Boucher,2019
5. The Photodegradation Resistance of Polymer Coatings for Pre-finished Steels;Cashmore,2010