Barak, Moshe. “System Design As A Three-Phase Dual-Loop (TPDL) Process: Types of Knowledge-Applied Sources of Feedback, and Student Development As Independent Learners”. Design and Technology Education: An International Journal 15, no. 2 (July 28, 2010): 32–43. Accessed March 14, 2025. https://ljmuojs-prod.leaf.cosector.com/DesignTechnologyEducation/article/view/2258.