Murena, Luigi, et al. “Treatment of Intracapsular Fractures of the Proximal Femur With Bipolar Hemiarthroplasty in Patients under the Age of 70: Clinical and Radiographic Results at Mean 20 Years Follow-up”. Acta Biomedica Atenei Parmensis, vol. 87, no. 1 -S, Apr. 2016, pp. 53-59, https://mattioli1885journals.com/index.php/actabiomedica/article/view/5350.