CROUS, Casparus J. Develop energy from shale with local ecosystems in mind. South African Journal of Science, [S. l.], v. 111, n. 3/4, p. 1, 2015. DOI: 10.17159/sajs.2015/a0101. Disponível em: https://sajs.co.za/article/view/3541. Acesso em: 5 may. 2024.