CLARK, S.; VAN NIEKERK, J.L.; PETRIE, J.; FAKIR, S. South African shale gas economics: Analysis of the breakeven shale gas price required to develop the industry. Journal of Energy in Southern Africa, [S. l.], v. 32, n. 1, p. 83–96, 2021. DOI: 10.17159/2413-3051/2021/v32i1a8938. Disponível em: https://energyjournal.africa/article/view/8938. Acesso em: 6 apr. 2025.