DeFrate, L. E., Doehring, T. C., Gilbertson, L. G., Donaldson, W. F., Kang, J. D., & Woo, S. L. Y. (1997). Axial rotation limits cervical spine flexion-extension range of motion. American Society of Mechanical Engineers Bioengineering Division Publication BED, 35, 445–446.

DeFrate, L. E., T. C. Doehring, L. G. Gilbertson, W. F. Donaldson, J. D. Kang, and S. L. Y. Woo. “Axial rotation limits cervical spine flexion-extension range of motion.” American Society of Mechanical Engineers Bioengineering Division Publication BED 35 (December 1, 1997): 445–46.

DeFrate LE, Doehring TC, Gilbertson LG, Donaldson WF, Kang JD, Woo SLY. Axial rotation limits cervical spine flexion-extension range of motion. American Society of Mechanical Engineers Bioengineering Division Publication BED. 1997 Dec 1;35:445–6.

DeFrate, L. E., et al. “Axial rotation limits cervical spine flexion-extension range of motion.” American Society of Mechanical Engineers Bioengineering Division Publication BED, vol. 35, Dec. 1997, pp. 445–46.

DeFrate LE, Doehring TC, Gilbertson LG, Donaldson WF, Kang JD, Woo SLY. Axial rotation limits cervical spine flexion-extension range of motion. American Society of Mechanical Engineers Bioengineering Division Publication BED. 1997 Dec 1;35:445–446.