1. Air New Zealand Sustainability Report. 2021. https://p-airnz.com/cms/assets/PDFs/2021-air-new-zealand-sustainability-report.pdf.
2. Air New Zealand Sustainable Aviation Fuel White Paper. 2021. https://p-airnz.com/cms/assets/PDFs/Airnz-sustainable-aviation-fuel-in-new-zealand-may-2021.pdf.
3. Allwood JM, Dunant CF, Lupton RC, Cleaver CJ, Serrenho ACH, Azevedo JMC, Horton PM, Clare C, Low H, Horrocks I, Murray J, Lin J, Cullen JM, Ward MD, Salamati M, Felin T, Ibell T, Zho W, Hawkins W. 2019. Absolute zero: delivering the UK's climate change commitment with incremental changes to today's technologies, UK FIRES, 2019. https://www.ukfires.org/wp-content/uploads/2019/11/Absolute-Zero-online.pdf.
4. Aviation Environment Federation. 2021. Environmental audit committee inquiry into net zero aviation and shipping: response from the aviation environment federation. https://www.aef.org.uk/uploads/2021/09/EAC-Net-Zero-IAS-inquiry-AEF-response.pdf.