Beyer, F., Yagdiran, A., Neu, P., Kaulhausen, T., Eysel, P., & Sobottke, R. (2013). Percutaneous interspinous spacer versus open decompression: A 2-year follow-up of clinical outcome and quality of life. Springer Berlin Heidelberg.

Beyer, F., A. Yagdiran, P. Neu, T. Kaulhausen, P. Eysel, ja R. Sobottke. Percutaneous Interspinous Spacer Versus Open Decompression: A 2-year Follow-up of Clinical Outcome and Quality of Life. Springer Berlin Heidelberg, 2013.

Beyer, F., et al. Percutaneous Interspinous Spacer Versus Open Decompression: A 2-year Follow-up of Clinical Outcome and Quality of Life. Springer Berlin Heidelberg, 2013.