1. European Commission. (2016). European thematic factsheet on services. Available at https://ec.europa.eu/info/sites/default/files/european-semester_thematic-factsheet_services_en.pdf
2. European Commission. (n.d.). Industry 5.0. Research and innovation. Retrieved October 19, 2022, from https://research-and-innovation.ec.europa.eu/research-area/industrial-research-and-innovation/industry-50_en
3. Kimbell, L. (2011). Designing for service as one way of designing services. International Journal of Design, 5(2).
4. Meroni, A., & Sangiorgi, D. (2016). Design for services. Routledge.
5. Merriam-Webster. (n.d.). Product definition & meaning. Merriam-Webster. Retrieved November 30, 2022, from https://www.merriam-webster.com/dictionary/product