Sjödén, Göran O J, Tomas Movin, Peter Güntner, Peter Aspelin, Leif Ahrengart, Hans Ersmark, and Anders Sperber. “Poor Reproducibility of Classification of Proximal Humeral Fractures: Additional CT of Minor Value”. Acta Orthopaedica 68, no. 3 (January 1, 1997): 239–242. Accessed May 27, 2026. https://actaorthop.org/actao/article/view/20753.