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Ekengren, J., Stambulova, N. B., Johnson, U., Carlsson, I.-M., Ryba, T. V. Veröffentlicht in Sport in Society: Cultures, Commerce, Media, Politics (2020)
Thue Bjørndal, C., Ronglan, L. T. Veröffentlicht in Cluster for Research into Coaching (2015)