Maphanga, W., S. Grobberlaar, R. Peach, and J. K. Visser. “Scoping Review: Factors, Threats and Opportunities of Outsourcing Maintenance Activities in the South African Pulp and Paper Industry”. The South African Journal of Industrial Engineering 36, no. 2 (August 29, 2025): 214–228. Accessed December 5, 2025. http://sajie.journals.ac.za/pub/article/view/3124.