Hipp, J. A., Guyer, R. D., Zigler, J. E., Ohnmeiss, D. D., & Wharton, N. D. (2015). Development of a novel radiographic measure of lumbar instability and validation using the facet fluid sign. Int J Spine Surg.

Hipp, John A., Richard D. Guyer, Jack E. Zigler, Donna D. Ohnmeiss, und Nicholas D. Wharton. "Development of a Novel Radiographic Measure of Lumbar Instability and Validation Using the Facet Fluid Sign." Int J Spine Surg 2015.

Hipp, John A., et al. "Development of a Novel Radiographic Measure of Lumbar Instability and Validation Using the Facet Fluid Sign." Int J Spine Surg 2015.