Russo, Luca, Johnny Padulo, Francesco Oliva, and Nicola Maffulli. 2021. “Letter to Editor about ‘Functional Evaluation of the Knee Following ACL Reconstruction: A Complex Dynamical Systems perspective’”. Journal of Human Sport and Exercise 16 (3):737-39. https://www.jhse.ua.es/article/view/2021-v16-n3-letter-editor-functional-evaluation-knee-following-a.