1. American Farm Bureau Federation. Comprehensive US Energy Policy. link: https://www.fb.org/issues/energy/comprehensive-us-energy-policy; 2021.
2. Government of the Netherlands. Towards a more sustainable agriculture and horticulture.link: https://www.government.nl/topics/agriculture/agriculture-and-horticulture; 2021.
3. Ministry of Agriculture and Rural Affairs of the People's Republic of China. Opinions of the Central Committee of the Communist Party of China and the State Council on Comprehensively Promoting Rural Revitalization and Accelerating Agricultural and Rural Modernization. link: http://www.moa.gov.cn/ztzl/jj2021zyyhwj/zxgz_26476/202102/t20210221_6361865; 2021.
4. Energy, exergy, exergoeconomic, and environmental analysis of a new biomass-driven cogeneration system;Ding;Sustainable Energy Technol Assess,2021
5. Distribution of specific greenhouse gas emissions from combined heat-and-power production in agricultural biogas plants;Siddiqui;Biomass Bioenergy,2020