DIAB, R. State of green technologies in South Africa. South African Journal of Science, [S. l.], v. 111, n. 3/4, p. 1, 2015. DOI: 10.17159/sajs.2015/a0102. Disponível em: https://sajs.co.za/article/view/3540. Acesso em: 17 aug. 2022.