A. Shane, Y. Kafwembe, and P. Kafwembe, “The viability of biomethane as a future transport fuel for Zambian towns: A case study of Lusaka”, J. energy South. Afr., vol. 29, no. 3, pp. 86–95, Sep. 2018, doi: 10.17159/2413-3051/2018/v29i3a4893.