1. Popovics, S., ‘Factors affecting the elastic deformation of concrete’, Proc. Int. Conf. MBM, Vol. 4, Japan, 1971, p. 172.
2. Jaeger, J., and Cook, N., ‘Fundamentals of Rock Mechanics’ (Elsevier, 1978) p. 79.
3. Carrasquillo, R., Slate, F. O., and Nilson, A. N., ‘Microcracking and behaviour of high-strength concrete subject to short-term loading’,ACI J. (1981) 171–186.
4. Ngab, A., Slate, F. O., and Nilson, A. N., ‘Microcracking and time dependent strains in high-strength concrete’,ACI J. (1981) 262–268.
5. Berg, O., ‘On the Problem of the Strength and Plasticity of Concrete’,Dokl. Akad. Nauk SSSR 70(4) (1950).