1. Abelson, P.H. (1991). National energy strategy.Science, 251, 1405.
2. Abernethy, V. (1993).Population politics: The choices that shape our future. New York: Insight Books, Plenum Press.
3. Abernethy, V. (1994. December). Optimism and overpopulation.The Atlantic Monthly, pp. 84–91.
4. Arizpe, L., Constanza, R., & Lutz, W. (1992). Population and natural resource use. In J.C.I. Dooge et al. (Eds.).An agenda of science for environment and development into the 21st. Century, (pp. 61–78). London: Cambridge University Press.
5. Ausubel, J.H. (1991). Does climate still matter?Commentary, Nature, 350, 649–652.