Øvre, Stein, et al. “Comparison of Distribution, Agreement and Correlation Between the Original and Modified Merle d’Aubigné-Postel Score and the Harris Hip Score After Acetabular Fracture Treatment: Moderate Agreement, High Ceiling Effect and Excellent Correlation in 450 Patients”. Acta Orthopaedica, vol. 76, no. 6, Jan. 2005, pp. 796-02, doi:10.1080/17453670510045390.