Tierney, R. T., Maldjian, C., Mattacola, C. G., Straub, S. J., & Sitler, M. R. (2002). Cervical spine stenosis measures in normal subjects. Journal of athletic training, 37(2), S. 190-193. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC164344/

Tierney, Ryan T., Catherine Maldjian, Carl G. Mattacola, Stephen J. Straub, and Michael R. Sitler. "Cervical Spine Stenosis Measures in Normal Subjects." Journal of Athletic Training 37, no. 2 (2002): S. 190-193.

Tierney, Ryan T., et al. "Cervical Spine Stenosis Measures in Normal Subjects." Journal of Athletic Training 37.2 (2002): S. 190-193.