CLAASEN, S. J. DIE OPTIMISERING VAN WGISTIEKE STEUN. The South African Journal of Industrial Engineering, [S. l.], v. 6, n. 1, 2011. DOI: 10.7166/6-1-413. Disponível em: http://sajie.journals.ac.za/pub/article/view/413. Acesso em: 8 apr. 2025.