1. Gartner, E. (2004). Industrially interesting approaches to ‘low-CO2’ cements. Cement and Concrete Research, 34, 1489–1498.
2. Malhotra, V. M. (1999). Making concrete ‘greener’ with fly ash. ACI Concrete International, 21, 61–66.
3. McCaffrey, R. (2002). Climate change and cement industry (pp. 15–19). Global Cement and Lime Magazine: Environmental special Issue.
4. Kumar M. P. (2007). Cements and concrete mixtures for sustainability. In Proceedings of Structural Engineering World Congress. Bangalore, India.
5. Villa, C., Pecina, E. T., Torres, R., & Gomez, L. (2010). Geopolymer synthesis using alkaline activation of natural zeolites. Construction and Building Materials, 24, 2084–2090.