1. Post, W.M., Peng, T.-H., Emanuel, W.R., King, A.W., Dale, V.H. and DeAngelis, D.L. (1990) Am. Sci. 78, 310–326
2. Keeling, C.D. and Whorf, T.P. (1992) in TRENDS ‘81: A Compendium of Data on Global Change Highlights (Boden, T.A., Sepanski, R.J. and Stoss, F.W., eds.) pp.14–17, Oak Ridge CO2 Information Analysis Center, Tennessee, U.S.A.
3. King, A.W., Emanuel, W.R. and Post, W.M. (1992) Environ. Manage. 16, 91–108
4. Böger, P. (1980) in Biochemical and Photosynthetic Aspects of Energy Production (San Pietro, A., ed.) pp. 175–190, Academic Press, New York, U.S.A.
5. Budyko, M.I., Ronov, A.B. and Yanshin, A.L. (1987) History of the Earth’s Atmosphere. Springer-Verlag, New York, U.S.A.