Ivanov G. STRUCTURAL FEATURES AND INTERACTIONS BETWEEN THE INDICATORS CHARACTERISING THE PHYSICAL AND THE TECHNICAL QUALITIES OF THE 12-14 YEARS OLD FOOTBALL PLAYERS PLAYING ON DIFFERENT GAME POSITIONS. kij [Internet]. 2021 Dec. 15 [cited 2026 May 26];49(6):1317-22. Available from: https://ojs.ikm.mk/index.php/kij/article/view/4506