1. Our common future,1987
2. Changing course: a global business perspective on development and the environment;Schmidheiny,1992
3. Socio-ecological principles for sustainability;Holmberg,1996
4. EEA, European Environmental Agency. Are we moving in the right direction? Indicators on transport and the environment. Environmental issues series no. 12; 2000. Available in pdf-format from: www.eea.eu.int.
5. Targets for stabilization of atmospheric CO2;Azar;Science,1997