1. California Air Resources Board. 2020. “Appendix D: Methodology for Determining Emission Reductions and Cost-Effectiveness.” September 2. https://ww2.arb.ca.gov/sites/default/files/2020-09/fy1920_ccssolicitation_appd_qm.pdf.
2. California Air Resources Board. 2017. “Appendix D: Tables for Emission Reduction and Cost-Effectiveness Calculations.” June 20. https://ww3.arb.ca.gov/msprog/moyer/guidelines/2017gl/2017_gl_appendix_d.pdf.
3. California Air Resources Board. 2011. “Frequently Asked Questions: Regulation for In-Use Off-Road Diesel-Fueled Fleets (Off-Road Regulation).” May. https://ww2.arb.ca.gov/sites/default/files/classic/msprog/ordiesel/faq/emissionfactorsfaq.pdf.
4. California Air Resources Board. 2020. In-Use Off-Road Mobile Agricultural Equipment. California Air Resources Board. https://ww2.arb.ca.gov/our-work/programs/mobile-agricultural-equipment.
5. Characteristics of agricultural tractors emissions under real-world operating cycle;Fu M.;Trans. Chin. Soc. Agric. Eng,2013