Bibliografia

1. Childs JD, Cleland JA, Elliott JM, et al.; American Physical Therapy Association. Neck pain: clinical practice guidelines linked to the International classification of functioning, disability, and health from the Orthopaedic section of the American Physical Therapy Association. J Orthop Sports Phys Ther 2008; 38(9): A1-A34.
2. Harris KD, Heer DM, Roy TC, Santos DM, Whitman JM, Wainner RS. Reliability of a measurement of neck flexor muscle endurance. Phys Ther 2005; 85(12): 1349-55.