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New Directions for Child and Adolescent Development > 2020 > 173 > 49 - 63
German Journal of Exercise and Sport Research > 2018 > 48 > 2 > 157-168
Journal of Human Kinetics > 2013 > 39 > 1 > 221-229
Journal of Human Kinetics > 2013 > 39 > 1 > 221-229
Journal of Human Kinetics > 2012 > 34 > 1 > 129-138
Journal of Human Kinetics > 2012 > 34 > 1 > 129-138