1. German Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB): Die EU-Verordnung zur Verminderung der CO2-Emissionen von Personenkraftwagen
2. International Council on Clean Transportation: Policy Update — EU CO2 Emission Standards for Passenger Cars and Light-Commercial Vehicles
3. European Aluminium Association: Aluminium in Cars. Unlocking the Light-Weighting Potential
4. Verband der Automobilindustrie: CO2-Regulierung bis 2020
5. Ducker Worldwide: Aluminium Content in Cars