References
- Riechert, Tr. (1943) Die Arteriographie der Hirngefasse, Lehman, Manchen-Berlin
- Lindgren, E. (1946) The Technique of direct (percutaneous) Cerebral Angiography. Brit. Journ. of Radiol., p. 326.
- Sievert, Rolf (1946) The Tolerance Dose and the Prevention of Injuries caused by Ionizing Radiations. Brit. Journ. of Radiol., p. 306.