1. 3K. K. Schiller, and W. H. Walton ; pp.27 -49 inMechanical Properties of Nonmetallic Brittle Materials . Butterworth & Co. (Publishers) Ltd., London, 1958 .
2. Skeleton strength and critical porosity in set sulphate plasters
3. 5V. Satava , "Hardening of Lime and Silica at 175o ,"Autoclaved Calcium Silicate Bid. Prod. Pap. Symp.1965 , pp.148 -51 , 1965 .