1. Humphry Davy, nitrous oxide, the Pneumatic Institution, and the Royal Institution
2. Office for National Statistics. Drug misuse in England and Wales: year ending March 2020. https://www.ons.gov.uk/peoplepopulationandcommunity/crimeandjustice/articles/drugmisuseinenglandandwales/yearendingmarch2020
3. Australian Institute of Health and Welfare. National Drug Strategy Household Survey 2019. https://www.aihw.gov.au/about-our-data/our-data-collections/national-drug-strategy-household-survey/2019-ndshs
4. Substance Abuse and Mental Health Services Administration. Key substance use and mental health indicators in the United States: results from the 2020 National survey on drug use and health. 2020. https://www.samhsa.gov/data/sites/default/files/reports/rpt35325/NSDUHFFRPDFWHTMLFiles2020/2020NSDUHFFR1PDFW102121.pdf
5. Increasing recreational nitrous oxide use: Should we worry? A narrative review