1. L. K. Altman, A new insulin given approval for use in U.S., http://www.nytimes.com/1982/10/30/us/a-new-insulin-given-approval-for-use-in-us.html, accessed 3rd May 2016
2. U.S. Food and Drug Administration, Scientific Considerations in Demonstrating Biosimilarity to a Reference Product, http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/UCM291128.pdf, accessed 11 Nov, 2015
3. European Medicines Agency, Guideline on non-clinical and clinical development of similar biological medicinal products containing recombinant human insulin and insulin analogues, http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2015/03/WC500184161.pdf, accessed 26 Oct, 2015
4. European Medicines Agency, Note for guidance on specifications: test procedures and acceptance criteria for biotechnological/biological products (CPMP/ICH/365/96) http://www.ema.europa.eu/docs/en_GB/document_library/Scientific_guideline/2009/09/WC500002824.pdf, accessed 28 Oct, 2015
5. More than insulin