References
- Stenstrom (1924) Amer. J. of Roentgenol. and Radium Ther., p. 176.
- Cutler (1935) Amer. J. of Roentgenol. and Radium Ther., p. 690.
- Benner (1933) Acta Radiol., p. 207.
- Sievert (1931) Acta Radiol., p. 190.
- Sievert (1932) Acta Radiol.
- Sievert (1931) Acta Radiol., p. 300.