1. (1) A. Deguchi, C. Hirai, et al.: “What Is Society 5.0?”, Society 5.0: A People-centric Super-smart Society, Springer Singapore, pp. 1-23 (2020)
2. (2) J. R. Savery: “Overview of Problem-based Learning: Definitions and Distinctions”, Interdisciplinary Journal of Problem-Based Learning, Vol. 1, Issue 1 (2006)
3. (3) J. L. Pecore: “From Kilpatrick's Project Method to Project-based Learning”, International Handbook of Progressive Education, Peter Lang Inc., pp. 155-171 (2015)
4. (4) L. W. Anderson, D. R. Krathwohl, et al.: “A Taxonomy for Learning, Teaching, and Assessing: a Revision of Bloom's Taxonomy of Educational Objectives”, Longman (2000)
5. (5) B. S. Bloom: “Taxonomy of Educational Objectives”, Pearson Education (1956)