Blumenthal, S. L., Guyer, R. D., Geisler, F. H., McAfee, P. C., & Regan, J. J. (2007). The First 18 Months Following Food and Drug Administration Approval of Lumbar Total Disc Replacement in the United States: Reported Adverse Events Outside an Investigational Device Exemption Study Environment. SAS J.

Blumenthal, Scott L., Richard D. Guyer, Fred H. Geisler, Paul C. McAfee, và John J. Regan. "The First 18 Months Following Food and Drug Administration Approval of Lumbar Total Disc Replacement in the United States: Reported Adverse Events Outside an Investigational Device Exemption Study Environment." SAS J 2007.

Blumenthal, Scott L., et al. "The First 18 Months Following Food and Drug Administration Approval of Lumbar Total Disc Replacement in the United States: Reported Adverse Events Outside an Investigational Device Exemption Study Environment." SAS J 2007.