1. Borgers, J., Pilgaard, M., Vanreusel, B., & Scheerder, J. (2016). Can we consider changes in sports participation as institutional change? A conceptual framework. International Review for the Sociology of Sport. https://doi.org/10.1177/1012690216639598 .
2. Borgers, J., Thibaut, E., Vandermeerschen, H., Vanreusel, B., Vos, S., & Scheerder, J. (2015). Sports participation styles revisited. A time-trend study in Belgium from the 1970s to the 2000s. International Review for the Sociology of Sport, 50(1), 45–63.
3. Breesch, D., Vos, S., & Scheerder, J. (2015). The financial viability of the fitness industry in Belgium. Sport, Business and Management: An International Journal, 5(4), 365–385.
4. Bureau Van Dijk. (2016). Bel-First. Financiële en economische informatie over bedrijven in België en Luxemburg [Bel-First. Financial and economic information on companies in Belgium and Luxembourg]. Retrieved June 28, 2016 from http://www.bvdinfo.com/nl-be/our-products/company-information/national-products/Bel-First
5. Eurostat. (2008). NACE Rev. 2. Statistical classification of economic activities in the European Community. Retrieved June 20, 2016 from http://ec.europa.eu/eurostat/documents/3859598/5902521/KS-RA-07-015-EN.PDF