1. Developments in the global cement market;Harder,2013
2. Activity Report 2009–2012;VDZ gGmbH,2012
3. Cement Technology Roadmap 2009 — Carbon Emissions Reductions up to 2050;International Energy Agency – IEA, World Business Council for Sustainable Development – WBCSD,2009
4. Energy efficiency in the cement production;Hoenig;Part 1: Cem. Int.,2013
5. A critical review on energy use and savings in the cement industries;Madlool;Renew. Sust. Energ. Rev.,2011