Steyn B, Roux S. Aggression and psychological well-being of adolescent taekwondo participants in comparison with hockey participants and a non sport group. Af. J. Phys Activity and Health Sci. [Internet]. 2009 Jul. 28 [cited 2026 Aug. 23];15(1). Available from: https://www.ajol.info/index.php/ajpherd/article/view/44636