BUYS, P. W.; OBERHOLZER, M.; PRINSLOO, T. Estimating Scale Efficiency Of Platinum-Mining Companies Environmental Performance: A South African Perspective. International Business & Economics Research Journal (IBER), [S. l.], v. 10, n. 12, p. 11–22, 2011. DOI: 10.19030/iber.v10i12.6646. Disponível em: https://clutejournals.com/index.php/IBER/article/view/6646. Acesso em: 17 jul. 2024.