A. I. Lorente, C. Hidalgo García, J. . Rodríguez Sanz, M. Maza Frechín, and A. . Pérez Bellmunt, “Range of Motion of the Upper Cervical Spine: flexion, extension, lateral bending, and axial rotation ”, Jorn. jovenes investig. I3A, vol. 8, Dec. 2020, doi: 10.26754/jjii3a.4877.