Turci, M. C., A. La Torre, G. Vernillo, V. G. Ferrara, and G. Grassi. “Isokinetic Strength of Foot Dorsal and Plantar Flexor Muscles in Young Male Orienteers”. Italian Journal of Anatomy and Embryology, vol. 118, no. 2, Jan. 2014, p. 191, https://oajournals.fupress.net/index.php/ijae/article/view/3904.