1. Organisation for Economic Co-Operation and Development (OECD) (2011). How’s Life?: Measuring Well-Being, OECD Publishing.
2. Huizinga, J. (2021). Homo Ludens: A Study of the Play Element in Culture, Kodansha.
3. Department of Economic and Social Affairs, Sustainable Development, United Nations (2023, March 03). Sustainable Development Goals, Goal 3: Ensure Healthy Lives and Promote Well-Being for All at All Ages. Available online: https://sdgs.un.org/goals/goal3.
4. World Health Organization (2023, March 03). Health Topics, Sustainable Development. Available online: https://www.who.int/health-topics/sustainable-development#tab=tab_3.
5. Lorber, M., Černe Kolarič, J., Kmetec, S., and Kegl, B. (2023). Association between loneliness, well-being, and life satisfaction before and during the COVID-19 Pandemic: A cross-sectional study. Sustainability, 15.