1. Nitrous oxide frequently asked questions, Available from http://www.justsayn2o.com accessed 16 May 2015.
2. Guidance on restricting the supply of nitrous oxide for recreational use,2015
3. Nitrous oxide: are you having a laugh? Education in Chemistry.;Zuck,2012
4. The Guardian 13 August 2015. Is the growth in nitrous oxide misuse a laughing matter?;Wolfson,2015
5. The use of nitrous oxide in anaesthetic practice: a questionnaire survey;Henderson;Anaesthesia,2002