STEYN, M.; KORNELIUS, G. “An economic assessment of SO2 reduction from industrial sources on the highveld of South Africa” by Steyn and Kornelius. Clean Air Journal, [S. l.], v. 28, n. 2, 2018. DOI: 10.17159/2410-972X/2018/v28n2a4. Disponível em: https://cleanairjournal.org.za/article/view/6902. Acesso em: 11 aug. 2022.