Murena , L. et al. 2020. Epidemiology and risk factors for contralateral proximal femur fracture: a single center retrospective cohort study on 1022 patients. Acta Biomedica Atenei Parmensis. 91, 4-S (May 2020), 115–121. DOI:https://doi.org/10.23750/abm.v91i4-S.9716.