References
- Åkerlund, Å. (1935) Metallic scale indicators for use in nailing fractures of the neck of the femur.. Acta radiol., p. 557.
- Dahl, G. O. (1950)
- Grebe, L. and Nitzge, K. (1930) Tabellen zur Dosierung der Rontgenstrahlen, Berlin und Wien
- Hultberg, S. (1950)
- Jacobsson, F. (1951) Carcinoma of the hypopharynx. A clinical study of 322 cases treated at Radiumhemmet, from 1939 to 1947.. Acta radiol., p. 1.