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\bibitem{Bela_etal2008} B{\'e}la, F., Bolliger, H. - J., Brigger, H., Meili, B., \& Niklaus, S. (2008). \textit{Pr{\"a}vention im Sport}. Bern: Bundesamt f{\"u}r Gesundheit (BAG); Swiss Olympic Association; Bundesamt f{\"u}r Sport (BASPO).

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