1. Umweltbundesamt: Environmental awareness in Germany. https://www.umweltbundesamt.de/en/topics/sustainability-strategies-international/environmental-awareness-in-germany. Accessed 17 Jan 2021
2. The Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU): Umweltbewusstsein in Deutschland 2018 - Ergebnisse einer repräsentativen Bevölkerungsumfrage, Berlin, May 2019
3. European Union: REGULATION (EC) No 1907/2006 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 18 December 2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), establishing a European Chemicals Agency, amending Directive 1999/45/EC and repealing Council Regulation (EEC) No 793/93 and Commission Regulation (EC) No 1488/94 as well as Council Directive 76/769/EEC and Commission Directives 91/155/EEC, 93/67/EEC, 93/105/EC and 2000/21/EC, European Union (2006)
4. European Union: DIRECTIVE (EU) 2018/851 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 30 May 2018 amending Directive 2008/98/EC on waste, European Union (2018)
5. Stolle, T.: Zukünftiges Abfallaufkommen von Photovoltaikmodulen. Materialfluss- und Reifegradanalyse für das Recycling, pp. 80–83. Diplomica Verlag, Hamburg (2016)