6.Kim, G. Y., Koo, K. M., Shin, K. S., Lee, E. B., Kang, Y. W., and Tohru, T., “Reduction
                           of Hydration Heat Velocity and Autogenous Shrinkage according to Retardation of Hydration
                           of High Strength Mass Concrete”, Journal of the Architectural Institute of Korea:
                           Structure&Construction, Vol.27, No.1, 2011, pp.137-144 (in Korean).
