Stecco, C., V. Macchi, A. Stecco, A. Porzionato, M. Imamura, and R. De Caro. “The Possible Use of Ultrasonography for the Diagnosis of Myofascial Neck Pain”. Italian Journal of Anatomy and Embryology, vol. 118, no. 2, Jan. 2014, p. 179, https://oajournals.fupress.net/index.php/ijae/article/view/3881.