Korovljev, Darinka, Dejan Madić, Boris Popović, Borislav Obradović, Milica Popović Stijačić, and Ivona Å obot. 2017. “Differences in Self-Perception of Adolescents in Relation to the Affiliation of the Individual or Collective Sports”. Arena-Journal of Physical Activities, no. 5 (July):79-89. https://www.uav.ro/jour/index.php/ajpa/article/view/827.