1. United Nations Environment Programme (UNEP), Cleaner Production Global Status Report 2002.
2. UNEP, International declaration on cleaner production, 1998.
3. UNEP and World Business Council on Sustainable Development (WBCSD), Cleaner production and eco-efficiency: complementary approaches to sustainable development, 1998.
4. World Bank, Greening industry, Washington 1999.
5. Cleaner production potentials in South-East Asia;Grütter,2001