"Insulin Human". The American Society of Health-System Pharmacists. Archived from the original on 22 October 2016. Retrieved 8 January 2017.
handle.net
hdl.handle.net
World Health Organization (2019). World Health Organization model list of essential medicines: 21st list 2019. Geneva: World Health Organization. hdl:10665/325771. WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
karger.com
"The History of Insulin"(PDF). Karger.com/. Basel, Switzerland: Karger Publishers. Archived from the original(PDF) on March 4, 2016. Retrieved June 10, 2015.
"Insulin Human". The American Society of Health-System Pharmacists. Archived from the original on 22 October 2016. Retrieved 8 January 2017.
"The History of Insulin"(PDF). Karger.com/. Basel, Switzerland: Karger Publishers. Archived from the original(PDF) on March 4, 2016. Retrieved June 10, 2015.