1. Correction: an immeasurable crisis? A criticism of the millennium development goals and why they cannot be measured;Attaran;PLoS Med.,2006
2. A Survey of Composite Indices Measuring Country Performance: 2008 Update;Bandura,2008
3. Expertise and the policy cycle;Barkenbus;Energy Environ. Resour. Center (Online),1998
4. Sustainability Indicators: Measuring the Immeasurable?;Bell,1999
5. Assessment of resource efficiency indicators and targets;BIO Intelligence Service, IFF, SERI,2012