1. American Agricultural Economics Association. (2000). Commodity cost and returns handbook. Ames, IA: American Agricultural Economics Association.
2. American Society of Agricultural and Biological Engineers. (2006). Agricultural machinery standards. St. Joseph, MI: American Society of Agricultural and Biological Engineers.
3. Argonne National Laboratory. (2013). The Greenhouse gases, regulated emissions, and energy use in transportation model (GREET). Retrieved from http://www.transportation.anl.gov/publications/index.html
4. Ba, B. H., Prins, C., & Prodhon, C. (2016). Models for optimization and performance evaluation of biomass supply chains: An operations research perspective. Renewable Energy, 87, 977–989.
5. Bowling RG, McKinley TL, Rawls EL, Tennessee Forage Budgets, UT extension, (2006) 23 Available at: http://economics.ag.utk.edu/budgets/PB1658ForageBudgets07.pdf.