References
- Compton, A. H. (1933) Phys. Rev, 43, p. 387.
- Millikan (1932) Phys. Rev, 39, p. 397.
- Legget (1926) Brit. Journ. of Actinotheraphy, 15, p. 29.
- Legget (1926) Brit. Journ. of Actinotheraphy, 1:6, p. 26.
- Rivera (1931) Z. Bl. Radiol, p. 760.
- Rivera (1931) Z. Bl. Radiol, p. 423.
- Eugster and Hauptmann (1934) Strahlentherapie, 49, p. 223.