1. British Medical Association Holding the line on working time 2016 https://www.bma.org.uk/collective-voice/policy-and-research/international-policy/ewtd
2. BBC News Dr Ronak Patel ‘had been singing to stay awake’ before fatal crash 2016 http://www.bbc.co.uk/news/uk-england-suffolk-36767868
3. International Civil Aviation Organisation Safety: Cabin crew fatigue management http://www.icao.int/safety/airnavigation/OPS/CabinSafety/Pages/Cabin-Crew-Fatigue-Management.aspx
4. Association of Anaesthetists of Great Britain and Northern Ireland Fatigue and anaesthetists 2014 https://www.aagbi.org/sites/default/files/Fatigue%20Guideline%20web.pdf
5. British Medical Association Junior Doctors rest requirements under New Deal and Work Time Regulations 2016 https://www.bma.org.uk/-/media/files/pdfs/practical%20advice%20at%20work/contracts/jdrestreqs.pdf?la=en