Osika, K. S. “System of Interconnections of the Achievement Motivation With the Sports Results of the Young Karate Enthusiasts”. Psychological Prospects Journal, no. 20 (April 2, 2012): 185–197. Accessed May 11, 2025. https://www.psychoprospects.vnu.edu.ua/index.php/psychoprospects/article/view/461.