LE ROUX, L.; KEMBO, J.; TUSTIN, D. Investigating drivers of hidden student support cost in an open distance learning environment of South Africa. South African Journal of Higher Education, [S. l.], v. 27, n. 6, 2016. DOI: 10.20853/27-6-311. Disponível em: https://www.journals.ac.za/sajhe/article/view/311. Acesso em: 7 oct. 2025.