1. Ministry of Environment and Sustainable Development, Romania’s National Strategy for Sustainable Development, Horizons 2013-2020-2030 (Bucharest, 2008)
2. Meadows D.H., Meadows D.L., Randers J., W.W. Behrens the III, The limits to growth (Potomac Associates – Universe Books, United States of America, 1972)
3. World Commission on Environment and Development, Our common future (Oxford University Press, Oxford; New York, 1987)
4. United Nations General Assembly, Agenda 21 (United Nations, 1992)
5. United Nations General Assembly, Report of the World Summit on Sustainable Development (Johannesburg, 2002)