Øster, Arne, and Chr. Halgreen. “Geometric Problems of Osteotomy: With Special Regard to Rotation-Angulation Osteotomy”. Acta Orthopaedica 44, no. 4-5 (January 1, 1973): 473–484. Accessed May 25, 2026. https://actaorthop.org/actao/article/view/29738.