1. Bryant, D., Nielsen, D., and Tangley, L. 1997. The Last Frontier Forests: Ecosystems and Economies on the Edge. World Resources Institute, Washington, DC.
2. Dudley, N., Schlaepfer, R., Jackson, W., and Jeanrenaud, J. P. In press. A Manual on Forest Quality.
3. ECE and FAO. 2000. Forest Resources of Europe, CIS, North America, Australia, Japan and New Zealand. U.N. Regional Economic Commissions for Europe and the Food and Agriculture Organisation, Geneva and Rome.
4. Jennings, S., Nussbaum, R., Judd, N., et al. 2003. The High Conservation Value Toolkit. Proforest, Oxford (three-part document).
5. Ministerial Conference on the Protection of Forests in Europe. 2002. Improved Pan-European Indicators for Sustainable Forest Management: as adopted by the MCPFE expert level meeting, October 7–8, 2002,Vienna,Austria.