HARDCASTLE, Paul; GERBER, Gerhard; FORTUIN, Henri. Critical questions (and some answers) in debates on shale gas. South African Journal of Science, [S. l.], v. 113, n. 11/12, p. 1, 2017. DOI: 10.17159/sajs.2017/a0245. Disponível em: https://sajs.co.za/article/view/3847. Acesso em: 6 may. 2024.