AlfframP. A.: An epidemiologic study of cervical and trochanteric fractures of the femur in an urban population. Acta orthop. scand (1964) Suppl. No. 65.
2.
BarnettE.NordinB. E. C.: The radiological diagnosis of osteoporosis: A new approach. Clin. Radiol.11 (1960), 166.
GarnS. M.RohmannC. G.NolanO.: The developmental nature of bone changes during aging. In: Relations of development and aging. Edited by BirrenJames E., Charles C. Thomas, Springfield Ill.1964.
5.
MeemaH. E.: Cortical bone atrophy and osteoporosis as a manifestation of aging. Amer. J. Roentgenol.89 (1963), 1287.
6.
VoseG. P.LockwoodR. M.: Femoral neck fracturing—Its relationship to radiographic bone density. J. Gerontol.20 (1965), 300.