Uredbe Vijeća (EZ) br. 1225/2009 (SL L 280, 24.9.2014., str. 19.).
Yaras årsredovisning för 2017, https://www.yara.com/siteassets/investors/057-reports-and-presentations/annual-reports/2017/yara-annual-report-2017-web.pdf/.