[1]
Zieleniewski, M. and Brent, A. 2008. Evaluating the costs and achievable benefits of extending technologies for uneconomical coal resources in South Africa: the case of underground coal gasification. Journal of Energy in Southern Africa. 19, 4 (Nov. 2008), 21–31. DOI:https://doi.org/10.17159/2413-3051/2008/v19i4a3335.