1. Kaempffert W (1936) The week in science: New control for infections. The chemical given to Roosevelt FD Jr. for streptococcus hailed as important discovery – New York Times (1857-Current file). New York, US: pp XX4
2. http://www.fda.gov/oc/history/elixir.html
3. http://www.umweltlexikon-online.de/fp/archiv/RUBwerkstoffmaterialsubstanz/Diethylenglykol.php
4. Goozner, Merrill (2004) The $800 million pill: The truth behind the cost of new drugs. University of California Press, Berkley, USA. pp 297, Chapter 8
5. Harris Richard (1964) The real voice. publisher: Macmillan, New York, pp 79