Ramazzina I, Pogliacomi F, Bertuletti S, Costantino C. Long term effect of selective muscle strengthening in athletes with patellofemoral pain syndrome. Acta Biomed. 2016;87(1 -S):60-68. Accessed December 19, 2025. https://www.mattioli1885journals.com/index.php/actabiomedica/article/view/5351