Weiland, Linda, Craig Law, and Bernadette Sunjka. “ENSURING SUSTAINABLE AND RESILIENT AIR TRAFFIC MANAGEMENT SYSTEMS FOR SOUTH AFRICA WITH COMPLEXITY AND WHOLE-OF-SOCIETY THEORY APPROACHES”. The South African Journal of Industrial Engineering 31, no. 3 (November 11, 2020): 97–109. Accessed May 3, 2024. http://sajie.journals.ac.za/pub/article/view/2424.