Chung, C., Tsai, S., Chen, C., Wu, T., Wang, D., Lan, H. H., & Wu, S. (2009). Comparison of the intervertebral disc spaces between axial and anterior lean cervical traction. Springer-Verlag.

Chung, Chin-Teng, Sen-Wei Tsai, Chun-Jung Chen, Ting-Chung Wu, David Wang, Haw-Chang H. Lan, ja Shyi-Kuen Wu. Comparison of the Intervertebral Disc Spaces between Axial and Anterior Lean Cervical Traction. Springer-Verlag, 2009.

Chung, Chin-Teng, et al. Comparison of the Intervertebral Disc Spaces between Axial and Anterior Lean Cervical Traction. Springer-Verlag, 2009.