1. Aamodt, J.B., Wenqin, C., 2014. Can the Chinese Biogas Experience Shed Light on the Future of Sustainable Energy Development Denver Journal of International Law & Policy Volume 42 - Number 1 September 2013 Fall - Number 2 January 2014 Winter/Spring - Number 3 June 2014 Summer - 46th Annual Sutton Colloquium https://digitalcommons.du.edu/cgi/viewcontent.cgi?article=1100&context=djilp.
2. A critical review of biogas production and usage with legislations framework across the globe;Abanades;Int. J. Environ. Sci. Technol.,2022
3. Abuhena, M., Al-Rashid, J., Azim, M.F., Chandra Barman, N., Niuz Morshed Khan, M., Golam Kabir, M., Rasul, N.M., Huang, Z., Akter, S., Huq, M.A., 2022. Optimization of Bacillus subtilis-based fermentation of anaerobic digestate and biohazard-free application in endophyte-assisted hardening of micropropagated plantlets for increasing survivability. Biocatalysis and Agricultural Biotechnology 45, 102512. Doi: 10.1016/j.bcab.2022.102512.https://www.sciencedirect.com/science/article/pii/S1878818122002390.
4. Act, T.F.I.C., 2020. The Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU). https://www.bmu.de/en/topics/environmental-information-and-integration/legislation-and-international-law/federal-immission-control-act-bimschg/.
5. Act, F.I.C., 2021. German Federal Ministry for the Environment, Nature Conservation, and Nuclear Safety. https://www.bmu.de/en/topics/water-waste-soil/waste-management-law/federal-immission-control-act-bimschg/.