1.
Zieleniewski M, Brent A. Evaluating the costs and achievable benefits of extending technologies for uneconomical coal resources in South Africa: the case of underground coal gasification. J. energy South. Afr. [Internet]. 2008 Nov. 1 [cited 2025 May 12];19(4):21-3. Available from:
https://energyjournal.africa/article/view/3335