1. Brink, A. B. A., ‘Engineering Geology of Southern Africa’, (Building Publications, Pretoria, South Africa, 1979).
2. Research Report 218;H. H. Weinert,1964
3. Bazant, Z. P. (Ed.) Mathematical Modelling of Creep and Shrinkage of Concrete’, Memorial 4: ‘Hurbert Rusch and his Legacy’ (sections reproduced from German original) (John Wiley and Sons Ltd. New York).
4. Alexander, M. G., ‘Aggregates and the deformation properties of concrete’,ACI Materials Journal 93 (6) (1996) 569–577.
5. Davis, D. E. and Alexander, M. C., ‘Properties of Aggregates in concrete (Part 2)’, (Hippo Quarries Technical Publication, Hippo Quarries, Sandton, South Africa, 1992).