Mattsson, Per, and Sune Larsson. “Calcium Phosphate Cement for Augmentation Did Not Improve Results After Internal Fixation of Displaced Femoral Neck Fractures: A Randomized Study of 118 Patients”. Acta Orthopaedica, vol. 77, no. 2, Jan. 2006, pp. 251-6, doi:10.1080/17453670610045984.