1. Occurrence and incidence of the second hip fracture;Schroder;Clinical Orthopaedics and Related Research,1993
2. Bilateral fractures of the femoral neck;Boston;Injury,1983
3. Bilateral non-contemporary fractures of the proximal femur;Dretakis;Acta Orthopaedic Scandinavia,1981
4. Fracture of neck of femur;Stewart;British Medical Journal,1957
5. An epidemiologic study of cervical and trochanteric fractures of the femur in an urban population;Alffram;Acta Orthopaedic Scandinavia,1964