KALININ R, BALAZSI R, HANŢIU I. OPTIMIZING SPORTS PERFORMANCE THROUGH MENTAL TOUGHNESS: PILOT STUDY. Studia UBB Educatio Artis Gymn. [Internet]. 2020 Jun. 30 [cited 2024 Nov. 30];65(2):69-80. Available from: https://studia.reviste.ubbcluj.ro/index.php/subbeducatio/article/view/1391