1. Amara R. The futures field (3 part series). The Futurist 1981;15(1):25–9; 15(2):63–71; 15(3):42–6.
2. World Commission on Environment and Development. Our common future. Oxford: Oxford University Press, 1987.
3. McMichael A. Planetary Overload. Cambridge: Cambridge University Press, 1993.
4. World Health Organization. Our Planet, Our Health: Report of the WHO Commission on Health and Environment. Geneva: WHO, 1992.
5. US Department of Health and Human Services. Healthy People 2010 Objectives (Draft). Washington, DC: USHHS, 1998.