1. British Pharmacopoeia Stationary Office, Medicines and Healthcare Products Regulatory Agency. Volume I. I., UK (2017).
2. European Pharmacopeia (2014) (8th edn).
3. British Pharmacopoeia, vol. I., Her Majesty Stationary Office, London, U. K. p. 1139 (2009).
4. Sweetman S. C. Martindale: The Complete Drug Reference. The Pharmaceutical Press, U. K. (37th edn) (2011)
5. Cefalexin drug: A new and efficient corrosion inhibitor for mild steel in hydrochloric acid solution