N. G. Jette, Y. L. Lim, H. L. Lim, S. A. Mokhtar, K. B. Gan, and D. K. A. Singh, “Lumbar Kinematics, Functional Disability and Fear Avoidance Beliefs Among Adults with Nonspecific Chronic Low Back Pain”, Sultan Qaboos Univ Med J, vol. 16, no. 4, pp. 430–436, Nov. 2016.