Ott, K., Klepper, G., Lingner, S., Schäfer, A., Scheffran, J., Sprinz, D. (2004): Reasoning goals of climate protection. Specification of Article 2 UNFCC, (Reasoning goals of climate protection. Specification of Article 2 UNFCC)(UBA-FB; 2004, 01), Berlin : Umweltbundesamt.