1. Alibaba. (2021). Carbon Neutrality Action Report. https://sustainability.alibabanews.com/download/Alibaba%20Group%20Carbon%20Neutrality%20Action%20Report_20211217_ENG_Final.pdf
2. Allen M. Axelsson K. Caldecott B. Hale T. Hepburn C. Hickey C. Mitchell-Larson E. Malhi Y. Otto F. Seddon N. & Smith S. (2020). The Oxford principles for net zero aligned carbon offsetting. University of Oxford September.
3. Amazon. (2022). Sustainability report. https://sustainability.aboutamazon.com/2022-sustainability-report.pdf
4. Carbon Offsets: An LCA Perspective
5. Arnold J. & Toledano P. (2021). Corporate Net-Zero Pledges: The Bad and the Ugly. Columbia Center on Sustainable Investment.