Pihlajamäki, H., Bøostman, O., Ruuskanen, M., Myllynen, P., Kinnunen, J., & Karaharju, E. (1996). Posterolateral lumbosacral fusion with transpedicular fixation:63 consecutive cases followed for 4 (2–6) years. Acta Orthopaedica, 67(1), 63–68. https://doi.org/10.3109/17453679608995612