1. IEA, a new methodology for environmental policy?;Bailey;Environmental Impact Assessment Review,1997
2. Toward integrated assessment in agriculture;Bland;Agricultural Systems,1999
3. Costanza. R. and Jorgensen, S.E. (Eds.), 2001. Understanding and Solving Environmental Problems in the 21st Century: Toward a New, Integrated “Hard Problem Science”. Elsevier, Oxford.
4. The value of the world's ecosystem services and natural capital;Costanza;Nature (London),1997
5. De Soysa, I., Gleditsch, N.P., 1999. To cultivate peace: agriculture in a world of conflict. PRIO Report 1/99, International Peace Research Institute, Oslo, 90p.