References
- Andersson, O. (1938) Acta radiol., 19, p. 126.
- Bauer, G. (1940) Acta chirurg. scand., 84
- Biegeleisen, H. I. (1939) Amer. J. Roentgenol., 42, p. 683.
- Dougherty and Homans (1940) Surg. Gynec. and Obstetr., 71, p. 697.
- Frimann-Dahl (1935) Aeta chirurg. scand., 76
- Kock (1940) Deutsch. med. Wschr., 1, p. 169.
- Lindblom, K. (1941) Acta radiol., 22, p. 288.
- Lohr, W. and Tolle, R. (1937) Arch. klin. Chirurg., 189, p. 321.