Schooner, P., C. Nordlöf, C. Klasander, and J. Hallström. “Design, System, Value: The Role of Problem-Solving and Critical Thinking Capabilities in Technology Education, As Perceived by Teacher”. Design and Technology Education: An International Journal, vol. 22, no. 3, Dec. 2017, pp. 60-75, https://openjournals.ljmu.ac.uk/DATE/article/view/1546.