Clayden, Jonathan, Nick Greeves, and Stuart G. Warren. Organic Chemistry. 2nd ed. Oxford: Oxford University Press, 2012. Web. <http://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=1591368>.
Stuart Warren  and Paul Wyatt. Organic Synthesis : The Disconnection Approach. 2nd ed. John Wiley & Sons, Incorporated, 2011. Web. <https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=819215>.