1. Criteria for the Measurement of Sustainable Tropical Forest Management;International Tropical Timber Organization (ITTO),1992
2. Authoritative and non-legally binding statement of principles for the conservation and sustainable management of all types of forests;United Nations Conference on Environment and Development,1992
3. Proceedings, Seminar of Experts on the Sustainable Development of Boreal and Temperate Forests. Conference on Security and Cooperation in Europe,1993
4. European Criteria and Most Suitable Quantitative Indicators for Sustainable Forest Management,1994
5. Criteria and Indicators for the Conservation and Sustainable Management of Temperate and Boreal Forests, The Montreal Process,1995