Bonokwane, L., and O. Ololade. “Socio-Economic Factors Affecting Smallholder farmers’ Willingness to Adopt Biodigester Technology in South Africa”. Journal of Energy in Southern Africa, vol. 33, no. 1, Mar. 2022, pp. 10-20, doi:10.17159/2413-3051/2022/v33i1a8860.