Hansen, H.-J. 1952. A Pathologic-Anatomical Study on Disc Degeneration in Dog: With Special Reference to the So-Called Enchondrosis Intervertebralis. Acta Orthopaedica. 23, sup11 (Dec. 1952), 1–130. DOI:https://doi.org/10.3109/ort.1952.23.suppl-11.01.