Kiviluoto, O., Santavlrta, S., Salenius, P., Morri, P., & Pylkkänen, P. (1985). Postero-lateral spine fusion: A 1–4-year follow-up of 80 consecutive patients. Acta Orthopaedica, 56(2), 152–154. https://doi.org/10.3109/17453678508994343