1. 1H. F. W. Taylor , The Chemistry of Cement ; p.142 . Academic Press, London., U.K., 1992 .
2. 2J. D. Bernal , "The Structures of Cement Hydration Compounds" pp.216 -36 inProceedings of the 3rd International Symposium on the Chemistry of Cement (London, U.K.). Cement and Concrete Association, London, U.K., 1952 .
3. 5A. Grudemo , "The Microstructure of Hardened Cement Paste" pp. 615-47in Fourth International Symposium on the Chemistry of Cement. U.S. Department of Commerce, Washington, DC, 1962 .