Condino, S., M. Mattioli-Belmonte, L. Ryskalin, L. Ryskalin, A. Bartalucci, P. Soldani, F. Busoni, A. Stecco, and M. Gesi. “Comparative Ultrasonographic Evaluation of the Achilles Paratenon in Symptomatic and Asymptomatic Subjects: An Imaging Study”. Italian Journal of Anatomy and Embryology, vol. 119, no. 1, Mar. 2015, p. 52, https://oajournals.fupress.net/index.php/ijae/article/view/2405.