1. Global Energy-Related CO2 Emissions by Sector (International Energy Agency, 2020); https://www.iea.org/data-and-statistics/charts/global-energy-related-co2-emissions-by-sector
2. Basma, H. & Rodríguez, F. Race to Zero: How Manufacturers are Positioned for Zero-Emission Commercial Trucks and Buses in Europe (International Council on Clean Transportation (ICCT), 2021); https://theicct.org/publication/race-to-zero-ze-hdv-eu-dec21/
3. Advanced Clean Fleets Regulation Summary (California Air Resources Board, 2023); https://ww2.arb.ca.gov/resources/fact-sheets/advanced-clean-fleets-regulation-overview
4. Memorandum of Understanding on Zero-Emission Medium- and Heavy-Duty Vehicles (Transport Decarbonisation Alliance, 2023); https://globaldrivetozero.org/site/wp-content/uploads/2023/08/Global-MOU-Signatories-2023.pdf
5. Proposal for a Regulation of the European Parliament and of the Council amending Regulation (EU) 2019/1242 as regards strengthening the CO2 emission performance standards for new heavy-duty vehicles and integrating reporting obligations, and repealing Regulation (EU) 2018/956 Document 52023PC0088 (European Commission, 2023); https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A52023PC0088