Mhlungu, Xolani, Sam Ramaila, and Umesh Ramnarain. “The Cognitive Complexity of Technical Sciences: An Analysis Using the Depth-of-Knowledge Level Scheme”. International Journal of Learning, Teaching and Educational Research 24, no. 2 (February 28, 2025): 613–635. Accessed July 22, 2026. https://ijlter.net/index.php/ijlter/article/view/2227.