Parker, Martyn J, and Chris Blundell. “Choice of Implant for Internal Fixation of Femoral Neck Fractures: Meta-Analysis of 25 Randomised Trials Including 4,925 Patients”. Acta Orthopaedica, vol. 69, no. 2, Jan. 1998, pp. 138-43, doi:10.3109/17453679809117614.