Jacopetti, Marco, Andrea Pasquini, and Cosimo Costantino. “Evaluation of Strength Muscle Recovery With Isokinetic, Squat Jump and Stiffness Tests in Athletes With ACL Reconstruction: A Case Control Study”. Acta Bio Medica Atenei Parmensis 87, no. 1 (May 6, 2016): 76-80. Accessed October 26, 2020. https://mattioli1885journals.com/index.php/actabiomedica/article/view/4502.