Brorson, Stig, Lars H Frich, Annika Winther, and Asbjørn Hróbjartsson. 2011. “Locking Plate Osteosynthesis in Displaced 4-Part Fractures of the Proximal Humerus”. Acta Orthopaedica 82 (4):475-81. https://doi.org/10.3109/17453674.2011.588856.