HARTMANN, D.; HATTINGH, T. IN DIS TREE – 4 WHAT?. The South African Journal of Industrial Engineering, [S. l.], v. 29, n. 3, p. 1–11, 2018. DOI: 10.7166/29-3-2050. Disponível em: http://sajie.journals.ac.za/pub/article/view/2050. Acesso em: 23 feb. 2024.