Ramazzina, I., Pogliacomi, F., Bertuletti, S., & Costantino, C. (2016). Long term effect of selective muscle strengthening in athletes with patellofemoral pain syndrome. Acta Biomedica Atenei Parmensis, 87(1 -S), 60-68. https://mattioli1885journals.com/index.php/actabiomedica/article/view/5351