Turunen, V., Nyyssönen, T., Miettinen, H., Airaksinen, O., Aalto, T., Hakumäki, J., & Kröger, H. (2012). Lumbar instrumented posterolateral fusion in spondylolisthetic and failed back patients: A long-term follow-up study spanning 11–13 years. Springer-Verlag.

Turunen, Veli, Timo Nyyssönen, Hannu Miettinen, Olavi Airaksinen, Timo Aalto, Juhana Hakumäki, and Heikki Kröger. Lumbar Instrumented Posterolateral Fusion in Spondylolisthetic and Failed Back Patients: A Long-term Follow-up Study Spanning 11–13 years. Springer-Verlag, 2012.

Turunen, Veli, et al. Lumbar Instrumented Posterolateral Fusion in Spondylolisthetic and Failed Back Patients: A Long-term Follow-up Study Spanning 11–13 years. Springer-Verlag, 2012.