Vosper, S.J., and J.-F. Mercure. “Assessing the Effectiveness of South Africa’s Emissions Based Purchase Tax for Private Passenger Vehicles: A Consumer Choice Modelling Approach”. Journal of Energy in Southern Africa, vol. 27, no. 4, Dec. 2016, pp. 25-37, doi:10.17159/2413-3051/2016/v27i4a1436.