1. Bullinger, H. J., Fähnrich, K. P., & Meiren, T. (2003). Service Engineering: Methodical Development of New Service Products. International Journal of Production Economics, 85(3), 275–287.
2. Council on Economic and Fiscal Policy. (2006). Economic Growth Strategy (in Japanese). Retrieved February 6, 2020, from https://www5.cao.go.jp/keizai-shimon/minutes/2006/0626/item2.pdf
3. D’Emidio, T., Dorton, D., & Duncan, E. (2015). Service Innovation in a Digital World. McKinsey Quarterly, February.
4. Fukao, K. (2015). Seisansei, Sangyokozo to Nihon no Seicho (Productivity, Industrial Structure, and the Growth of Japan). RIETI Policy Discussion Paper Series, 15-P-023. (In Japanese).
5. Fukuda, K., Nakajima, M., Nishimura, S., & Nishimura, T. (2017). Non-Routine Knowledge Sharing in Elderly Care-Facility for Better Services. In Proceedings of the 18th European Conference on Knowledge Management (pp. 326–333). ACPI.