Nkosi, S’busiso M., et al. “Renewable Energy Potential of Anaerobic Mono- and Co-Digestion of Chicken Manure, Goat Manure, Potato Peels and Maize Pap in South Africa”. South African Journal of Science, vol. 117, no. 11/12, Nov. 2021, https://doi.org/10.17159/sajs.2021/10362.