1. Adam, Barbara (2006): Time. Cambridge, UK: Polity Press (Key concepts).
2. Arrhenius, Svante (1907): Das Werden der Welten. Leipzig: Akademische Verlagsgesellschaft.
3. Engels, Anita (2009): The European Emissions Trading Scheme: An exploratory study of how companies learn to account for carbon. In: Accounting, Organizations and Society, Jg. 34, H. 3- 4, pp. 488-498.
4. Bischof, Walter (1960): Periodical Variations of the Atmospheric C0,-content in Scandinavia. In: Tellus, Jg. XII, H. 2, pp. 216-226.
5. Bischof, Walter (1962): Variations in concentration of carbon dioxide in the free atmosphere. In: Tellus, Jg. XIV, H. 1, pp. 87-90.