1. ‘Eurocode 2, Design of concrete structures, Part 1: General rules and rules for building, October 1989’.
2. ‘ISO Norm 2736/2, Making and curing of test specimens for strength tests’.
3. Siviero, E., ‘Early evaluation of concrete strength’, in Second International Symposium on Quality Control of Concrete Structures, CEB-RILEM, Ghent, June 12–14, 1991.
4. Price, W. H., ‘Factors influencing concrete strength’,Proc. Am. Concr. Inst. 47 (1951) 417–432.
5. Collepardi, M., ‘Scienza e Tecnologia del Calcestruzzo’ (Hoepli, Milano, Italy, 1991).