Scholes, B., P. Lochner, G. Schreiner, Luanita Snyman-an der Walt, and M. de Jager. 2016. “Shale Gas Development in the Central Karoo: A Scientific Assessment of the Opportunities and Risks”. Clean Air Journal 26 (2):6. https://doi.org/10.17159/caj/2016/26/2.7002.