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German Journal of Exercise and Sport Research > 2017 > 47 > 3 > 221-231
Interchange > 2015 > 46 > 4 > 439-453
Human Movement > 2012 > 13 > 3 > 258-263
Human Movement > 2012 > 13 > 3 > 258-263
Studies in Philosophy and Education > 2001 > 20 > 6 > 535-549