Domone, P. L. J., and J. M. Illston. 2010. Construction Materials: Their Nature and Behaviour. 4th ed. Milton Park, Abingdon, Oxon: Spon Press. http://encore.lib.warwick.ac.uk/iii/encore/record/C__Rb3059306.
Megson, T. H. G. 2014. Structural and Stress Analysis. Third edition. Oxford, UK: Butterworth-Heinemann is an imprint of Elsevier. http://encore.lib.warwick.ac.uk/iii/encore/record/C__Rb2821754.