1. Goldsmith, E. (1992, “Development as enclosure”,The Ecologist, Vol. 22 No. 4, July, pp. 132‐49.
2. Natural resources and an optimum human population
3. Stern, D. I. , Common, M. S. and Barbier, E. B. (1995, “Economic growth and environmental degradation; the environmental kuznets curve and sustainability”,World Development.
4. A critical examination of the ultimate resource and the resourceful earth
5. Can renewable energy sources sustain affluent society?