Botes, L.A, W. Booysen, M.J. Mathews, and M. Kleingeld. 2019. “A Systematic Decision Support System to Objectively Evaluate Retrospective Energy Efficiency Modelling Options”. Journal of Energy in Southern Africa 30 (2):52-63. https://doi.org/10.17159/2413-3051/2019/v30i2a5740.