1. ‘Construction statistics annual’, 2010, http://www.corporatewatch.org.uk
2. US Geological Survey: ‘Mineral commodity summaries’, 2010, http://minerals.usgs.gov/minerals/pubs/commodity/cement/mcs-2010-cemen.pdf
3. Hammond G, Jones C: ‘Inventory of carbon and energy’, Version 1.6a, University of Bath, Bath, UK, 2008.
4. Sustainable development and climate change initiatives
5. Industrially interesting approaches to “low-CO2” cements