1. US Geological Survey (2009) Mineral commodity summaries 2009
2. Hendricks CA, Worrell E, Price L, Martin N, Ozawa Meida L, de Jager D, Riemer P (1998) In: Proceedings of the 4th international conference on greenhouse gas control technologies, Interlaken, Austria
3. Mehta PK (1980) World Cem Technol 11:167
4. Sharp JH, Lawrence CD, Yang R (1999) Adv Cem Res 11:3
5. Majling J, Sahu S, Vlna M, Roy DM (1993) Cem Concr Res 23:1351